Hopp reached the final of the
2011 WDF World Cup boys' singles, and won the boys' singles event at the 2012
WDF Europe Youth Cup. He also reached the last 16 of the
2012 Dutch Darts Masters, defeating
Terry Jenkins and
Steve Beaton before losing to
Paul Nicholson. Hopp qualified for the
2013 PDC World Darts Championship by winning the Central European Qualifier in
Bielefeld and in doing so became the second-youngest player ever to compete at the championships after
Mitchell Clegg. Hopp played
Charl Pietersen of South Africa in the preliminary round winning by 4 legs to 1 to set up a first round match against
Denis Ovens. Hopp took the first and third sets to lead the match 2–1, but then lost six legs in a row to bow out of the tournament with a 2–3 defeat. Hopp entered Q School in an attempt to win a PDC Tour Card to play the full circuit in 2013, but could not get past the last 64 in any of the four days. He qualified for the second European Tour event of the year, the
European Darts Trophy and beat
Dragutin Horvat 6–1 in the first round, before losing 3–6 to
Dean Winstanley. Hopp also qualified for the
European Darts Open and the
Austrian Darts Open, but lost in the first round in both. These results helped him to qualify for the
European Championship for the first time through the European Order of Merit. He faced
Paul Nicholson in the first round and led 3–1, but would lose 4–6. Hopp beat
Mark Walsh 6–4 in the opening round of the
German Darts Championship and was then defeated 6–3 by
Jamie Caven. Hopp lost in the semi-finals of the German World Championship Qualify to
Andree Welge, but reached the tournament anyway due to finishing the year eighth on the
European Order of Merit which saw him claim the first of four spots available to non-qualified players. Hopp played ninth seed
Robert Thornton in the
first round and won the first set, before going on to be defeated 3–1. Hopp began 2014 ranked world number 76, outside of the top 64 who guarantee themselves entry into every event for the year ahead. He entered Q School in an attempt to win a two-year tour card but was not successful and only had PDPA Associate Member status for 2014 which gave him entry to UK Open and European Tour qualifiers as well as the Challenge Tour. He qualified for six of the eight European Tour events losing in the first round in five of them, with the exception coming at the
European Darts Grand Prix by eliminating Mike de Decker, but then lost 6–1 to
Dave Chisnall. He also lost two finals on the
Youth Tour and the final of the 10th
Challenge Tour event 5–4 to Jay Foreman.
2015 In the German Qualifier for the
2015 World Championship, Hopp beat
Sascha Stein 10–8 in the final but subsequently qualified through the Pro Tour Order of Merit to begin the tournament in the first round, instead of the preliminary round. He produced a superb performance against
Mervyn King to beat him 3–2, sealing his place in the second round with a 161 finish. Hopp hit 10 180s during the match, the most of all the first round players in the event. He was comfortably defeated 4–0 by
Vincent van der Voort in the second round. However, his play during 2014 and at the World Championship saw him rise 14 places in the rankings during the year to start 2015 62nd, the first time Hopp has been inside the top 64 who gain their PDC tour cards. At the first
UK Open Qualifier he eliminated
Kevin Painter,
Ian White and
Michael Smith to play in his first quarter-final in the PDC, where
Brendan Dolan beat Hopp 6–5. This result helped him enter the
UK Open at the third round stage where
Kim Huybrechts beat him 9–7 after Hopp had been 7–5 up. Hopp played in his first
World Cup of Darts this year. He partnered
Jyhan Artut and they saw off India and Austria to make the quarter-finals, where they lost both their singles matches against England to exit the tournament. He was invited to play in the inaugural
World Series of Darts Finals and saw off
Dimitri Van den Bergh 6–3, before losing by a reversal of this scoreline to
Peter Wright in the second round. In the final of the
2015 World Youth Championship, Hopp was never ahead of his opponent
Nathan Aspinall until the final leg when he sealed the title with a 6–5 win.
2016 Hopp lost 3–1 to
Benito van de Pas in the first round of the
2016 World Championship. He couldn't qualify for the
UK Open, but at the fourth
Players Championship he reached his first quarter-final in a year by seeing off
Mensur Suljović 6–2. Hopp then lost by a reversal of this scoreline to
Gerwyn Price. He claimed the fifth
Development Tour title with a 4–2 victory over Steve Lennon. At the
European Darts Matchplay, Hopp beat
Joe Murnan 6–5,
Ian White 6–2 and
Terry Jenkins 6–3 to progress through to his first European Tour quarter-final, where he was defeated 6–4 by
Peter Wright. He got to the second round of the
European Championship by eliminating
Benito van de Pas 6–4, but was heavily defeated 10–3 by
James Wade. His World Youth title qualified Hopp for his first
Grand Slam of Darts where he was beaten 5–4 by
Brendan Dolan and defeated
Martin Adams 5–2, but a 5–1 loss to
Michael van Gerwen would see him finish third in Group A and exit the tournament.
2017 After eliminating
Vincent van der Voort 3–1 at the
2017 World Championship, Hopp lost 4–0 to
Kim Huybrechts in the second round. He teamed up with
Martin Schindler at the
World Cup and they played the Netherlands in the quarter-finals after overcoming Northern Ireland and Brazil. The match went to a doubles game after Schindler lost to
Michael van Gerwen and Hopp beat
Raymond van Barneveld 4–3 and Germany lost 4–1. He was also given an invite to play in the
2017 US Darts Masters, but was knocked out in the first round by
Canada's
Dave Richardson 6–3. He also qualified for the
2017 German Darts Masters, but was again knocked out 6–3 in the first round, this time by
Gary Anderson.
2018 After failing to qualify for the
2018 World Championship, Hopp had a steady start to 2018, he did not win enough ranking money in the UK Open Qualifiers and therefore failed to qualify for the
2018 UK Open, but he then reached the quarter-finals at the
2018 German Darts Grand Prix and
Players Championship 7. Hopp was one of four Host Nation Qualifiers for the
2018 German Darts Open. He dispatched
Zoran Lerchbacher 6–1 in the first round, before defeating the defending champion and No. 2 seed
Peter Wright,
Benito van de Pas and
Joe Cullen each 6–4. This made Hopp the first German to qualify for a
PDC European Tour semi-final. He then defeated the reigning world champion
Rob Cross 7–6 in a last leg decider in the semi-finals. After missing 4 match darts to win 7–5, Hopp took out 121 on the bullseye. He then faced
Michael Smith in the final. After being behind for most of the match, Hopp won 8–7, again taking out 121 on the bullseye (with exactly the same route as in his semi-finals victory over Cross), to win the title. Hopp won his second senior PDC title at
Players Championship 19. He defeated
Alan Norris 6–2 in the first round, then had wins over Davy van Baelen 6–4,
Darren Webster 6–2,
Jamie Hughes 6–1,
Jermaine Wattimena 6–5 in a deciding leg to reach the semi-finals. He then achieved 6–3 victories against
James Wilson and
Madars Razma to pick up the title.
2019 At the
2019 PDC World Darts Championship, Hopp defeated
Danny Noppert 3–0 to reach the third round for the first time. He lost his third-round match against
Michael van Gerwen, who went on to win the tournament. Following
Gary Anderson's withdrawal from the
2019 Premier League, Hopp was selected as one of nine 'contenders' to replace him. He played a one-off match against
Raymond van Barneveld on night seven in
Berlin, losing 7–3.
2020–2024: Injury issues and loss of Tour Card Following the
COVID-19 pandemic, Hopp suffered from injury issues, most notably torn ankle ligaments in June 2021. This injury continued to plague him, losing his tour-card at the end of 2022 and failing to regain it at both the 2023 and 2024 Q-School. In August 2024, he made his return to the PDC European Tour, appearing at the
2024 German Darts Championship as a host-nation qualifier. In his first-round match, a first big-stage appearance in two years, he defeated
José de Sousa 6–2 before losing in the second round to
Joe Cullen.
2025 Following his return to the
PDC European Tour, Hopp regained his Tour Card at
2025 Q-School after finishing 10th in the European Q-School Order of Merit. Hopp qualified for 2 events on the
2025 European Tour. He achieved one victory; beating
Luke Woodhouse 6–3 in the first round of the
2025 Dutch Darts Championship. He lost to eventual champion
Jonny Clayton 6–2 in the second round. Hopp reached the last 16 twice in
2025 PDC Players Championship series events, doing so at Players Championship 11 in April and Players Championship 30 in October. In the first round of the
2026 PDC World Darts Championship, his first appearance at the competition since the 2021 tournament, Hopp defeated
Martin Lukeman 3–1. ==World Championship results==