Queen's Park Gallagher recommended Robertson to
Queen's Park, located conveniently for Robertson and his family in Glasgow's South side. In their youth setup he was nurtured by key figures such as head of youth David McCallum and technical director Andy McGlennan, who encouraged Robertson's switch to left-back from a more advanced position. He scored his first senior goal when losing 2–1 at home to
East Stirlingshire on 13 November 2012. As a part-time footballer, Robertson trained/played 3 evenings per week plus Saturday afternoons. Robertson did work as a telephone service recipient for ticket bookings at
Hampden Park where Queen's Park were based. At lunch time he used the gym facilities there to bulk up. He later commented on that season with Queen's Park, "I did apply for a couple of uni courses, but by the January or February of the season I knew at the end of the season there was going to be at least two options of full-time football. I knew I could put that (university) on the backburner and I was at least going to have a crack at it (professional football)." Robertson's career plan should he have followed his brother in studying at university, was to teach
PE.
Lawrence Shankland scored the 87th minute Queen's Park goal, losing the away leg 3–1.
Dundee United 19-year-old Robertson and his Queen's Park teammate
Aidan Connolly, signed for
Scottish Premiership side
Dundee United on 3 June 2013. Having had requests ignored for a transfer fee for Douglas, Queen's Park (then an amateur club) protested at the prospect of more players departing to United for free. The two clubs agreed a deal involving a percentage of future transfers, later benefiting Queen's with £300 000.
Jackie McNamara was Robertson's manager at Dundee United. Robertson later remarked, "Jackie McNamara had been a great full-back [at Celtic] and he helped me." Rankin also conscientiously covered the spaces left when Robertson went on an attacking run. On 22 September 2013, Robertson scored his first Dundee United goal, drawing 2–2 at home with
Motherwell. He ran from his own half before sending a low left-foot drive in to the goal from 22 yards. Soon afterwards he agreed a new contract with United, until May 2016. He was voted
SPFL young player of the month for September 2013 and player of the month for November 2013. As well as Robertson, other recent and/or future full Scotland internationalists in that
2013–14 Dundee United squad were
Stuart Armstrong,
Gary Mackay-Steven,
Mark Wilson,
Ryan Gauld and
John Souttar. On 12 April 2014, Robertson played in the
Scottish Cup 3–1 semi-final win versus
Rangers at
Ibrox. Armstrong and Mackay-Steven scored, as did
Nadir Çiftçi. In April 2014, Robertson won the
PFA Scotland Young Player of the Year award, and was named in the
PFA Scotland Team of the Year for the
2013–14 Scottish Premiership. Robertson and United finished the season fourth best team in the league in Scotland.
Hull City in 2015 Aged 20, on 29 July 2014 Robertson signed a three-year contract with English
Premier League club
Hull City. The transfer fee was £2.85 million. Hull City's chief scout,
Stan Ternent, explained, "I'd been looking at
Stuart Armstrong but [Robertson] was the no brainer … he'd a history with Celtic and he was always a determined lad given how he'd recovered from his setbacks. You could see straight away he had ability and he can only get better." Robertson made a goal-line clearance debuting on the opening day of the
2014–15 Premier League season. Hull won 1–0 at
Queens Park Rangers. That August he was Hull's Player of the Month. He made 24 Hull appearances that season, all in the league. Robertson scored the opener for his first Hull goal on 3 November 2015 at
Brentford. That 2–0 win put Hull top of the Championship table. He started the
2016 Championship play-off final against
Sheffield Wednesday. Hull won 1–0 for promotion to the Premier League. Robertson played in 52 Hull games in all competitions that season.
Liverpool 2017–2019 in the
2018 UEFA Champions League Final On 21 July 2017, Robertson signed a long-term deal with
Liverpool under the management of
Jurgen Klopp. The fee was an initial £8 million.
Kevin Stewart went to Hull City at the same time for almost the same amount, in what has been described as a swap deal in all but name. On 19 August, Robertson debuted for Liverpool in a 1–0 league win over
Crystal Palace. Robertson won the Man of the Match award. opening the first team opportunity for Robertson to grab on 2 December. Liverpool that day won 5–1 at home in the league against
Brighton and Hove Albion. Robertson scored his first Liverpool goal in the last game of the
2017–18 season, an 4–0 home win against
Brighton and Hove Albion. He played the full 90 minutes of the
2018 UEFA Champions League final, 3–1 defeat to Real Madrid in
Kyiv. The Independent wrote, "Robertson was one of Liverpool's more impressive players on the night, the highlight of his display being an expertly-timed last-ditch tackle to prevent
Cristiano Ronaldo from scoring." Robertson ended the season with 30 appearances in all competitions, including 22 in the Premier League and 6 in the UEFA Champions League. In the 2018–19 Premier League season, Robertson registered 11
assists. Liverpool finished the
league season as runners-up to
Manchester City, to whom they suffered their only league defeat. Liverpool's 97 points was the then third-highest total in the history of the English top division. It was also the most points scored by a team without winning the title. Liverpool were unbeaten at home in the league for a consecutive season and matched the club record of 30 league wins in a season. On 25 April, Robertson was named in the 2018-19
PFA Team of the Year alongside Liverpool teammates
Trent Alexander-Arnold,
Sadio Mané and
Virgil van Dijk; the following season, he was named in the team
a second time. On 7 May 2019, Robertson started in the 4–0 UEFA Champions League semi-final second-leg, home win against
Barcelona. Described as "one of the most memorable comebacks of all time", that overturned the 1st leg 3–0 defeat. Robertson subbed off injured, 1–0 at half-time after being kicked by
Luis Suárez. On 1 June 2019, Robertson played the full 90 minutes of the
UEFA Champions League final an 2–0 win against
Tottenham Hotspur in Madrid, securing Liverpool's sixth European Cup title. He became the first Scot to win the final since
Darren Fletcher (an unused substitute in
2008), and the first to play in the final winning team since
Paul Lambert in
1997. In December, Robertson played in the
2019 FIFA Club World Cup 2–1 semi-final win over
Monterrey. He then played the entirety of the final, a 1-0 extra-time win over
Flamengo. In Liverpool's first
2019–20 UEFA Champions League home game on 2 October, Robertson scored his first European goal against
Red Bull Salzburg; Liverpool won 4-3. On 2 November 2019, Robertson scored his second Liverpool Premier League goal, equalising in the 87th minute against
Aston Villa; Liverpool went on to win that game 1-2 in stoppage time. In the
2019–20 domestic campaign, Robertson contributed 2 goals and 12 assists for Liverpool. In the 2020–21 season, the majority of games were played
behind closed doors due to the
COVID-19 pandemic. On 22 November 2020, Liverpool broke the club record for longest unbeaten run at home in the league (which had previously stood at 63) with a 3–0 win over
Leicester City. That run ended on 21 January 2021 following a 1–0 defeat to
Burnley; it had stood at 68, the second-longest unbeaten home run in English top-flight history, behind
Chelsea's run of 86 games between March 2004 and October 2008, and the longest under a single manager. Robertson remained first choice left-back, starting 48 of the 50 games he played. He and Liverpool missed out on winning a historic quadruple that season. They defeated
Chelsea in penalty shootouts in both the
EFL Cup (11–10) and
FA Cup (6–5) finals. Both finals were 0–0 after extra time. Robertson scored his team's eighth penalty in the 11–10 win. However, they finished second in the
Premier League and were runners up in the
UEFA Champions League, losing
the final 1–0 in Paris to Real Madrid. He was selected as part of the
UEFA Champions League Team of the Season. At the start of the 2022–23 season, Robertson and Liverpool won the
FA Community Shield. That piece of silverware meant that both manager Jürgen Klopp and Robertson had won all seven available first-tier trophies with Liverpool. On 26 December 2022 in a 1-3 win at
Aston Villa, Robertson became the defender with most
assists in Premier League history with 54; surpassing previous record
Leighton Baines.
2023–present in 2026 On 16 September 2023, with captain
Virgil van Dijk suspended and vice-captain
Trent Alexander-Arnold injured, Robertson was made captain for a 3–1 comeback win against
Wolverhampton Wanderers. He marked his 200th Premier League appearance for Liverpool by scoring Liverpool's second goal in that game; his 9th Liverpool goal. On 25 February 2024, Robertson and Liverpool defeated Chelsea 1–0 after extra-time, winning the
2024 EFL Cup final. Robertson managed only 30 appearances for Liverpool that season, On 1 September 2024, after a 3–0 win over
rivals Manchester United, Robertson was among those to comment on the defensive solidarity under new manager
Arne Slot, as opposed to high-risk
gegenpressing under Jürgen Klopp. Robertson added, "We look a bit more secure defensively." Robertson added later in the season, "It was obviously a different style [back then], It was high energy and high press. This team is a bit more controlled. Two very different teams." An article from
Fara Williams in May 2025 analysing the impact of Slot's style of play on Robertson included, "You think back to the Klopp teams in terms of how high up the pitch both Trent and Robertson used to play and how aggressive they were in terms of their start position. That has changed under Arne Slot." Williams added, "He (Slot) is more patient in how they build. They don't leave themselves too exposed to transitions. They are not as expansive through their full-backs. We talk about how well their midfield has played this year, a lot of play has gone through the midfield, whereas under Klopp, they went more down the outside. So there has been a lot of differences, a lot of changes in the system, and that affects personnel. You can even look at the amount of time Robertson and
Alexander-Arnold have been on the pitch together and I don't think that has happened as much as before." Slot explained in November 2024 that Robertson being rotated in selection was due to him missing pre-season training. Slot then praised Robertson, despite receiving a red card in the 17th minute in a 2–2 home draw with
Fulham on 14 December. Robertson made 45 appearances that season On 29 August 2025, following the departure of Trent Alexander-Arnold to Real Madrid, 31-year-old Robertson became Liverpool's new vice-captain, acting as deputy to Virgil van Dijk. Despite that, he initially lost his starting spot in the first five games of the new season to new signing
Milos Kerkez. Robertson was restored as first choice left-back and Kerkez was benched on 17 September 2025, for the 3–2
UEFA Champions League home win against
Atlético Madrid. Robertson delivered a positively-received performance, also scoring the opener from a
Mohamed Salah free-kick. After Kerkez was restored as the first-choice left-back, Robertson was linked with a transfer to
Tottenham Hotspur during the January 2026 transfer window; however, the offer was reportedly rejected due to Liverpool's inability to recall
Kostas Tsimikas from his own
loan spell at
Roma. On 9 April 2026, Robertson announced that he would leave Liverpool at the end of the season, following the expiry of his contract. == International career ==