Heerenveen Sinkgraven started playing football with MVV Alcides from his hometown
Meppel. He ended up in the youth academy of
SC Heerenveen. Sinkgraven had a breakthrough season in 2013–14 playing 17 games while starting five of them. He made his debut in the 2–2 draw against
Roda JC Kerkrade on 18 January 2014 by replacing
Hakim Ziyech. On 28 March 2014, he extended his contract until the summer of 2017. On 22 November 2014, he scored an own goal in a 4–1 away loss to
Ajax. Sinkgraven's great performances for Heerenveen caught the eye of many giant English clubs.
Chelsea,
Liverpool and
Manchester United were all very interested in buying the teenage Sinkgraven.
Ajax in 2015 On 30 January 2015, after excellent performances for SC Heerenveen, it was announced that Sinkgraven had joined Ajax for a fee of €7 million at the age of 19 years old, making him the club's most expensive acquisition since
Miralem Sulejmani, who had also made the transfer to Ajax from Heerenveen. He signed a five-and-a-half-year contract with the club and was given the number 8 shirt previously worn by
Lerin Duarte, who was sent on a six-month loan spell to Heerenveen in return. He made his debut for the first team of Ajax in the starting lineup on 5 February 2015 in a 1–0 home loss to
AZ. Sinkgraven helped guide Ajax to the final of the
2016–17 Europa League where they lost to Manchester United. Sinkgraven was also a part of the Ajax team that won the Dutch
Eredivisie title and the Dutch
KNVB Cup during the
2018–19 season. In that same season, Sinkgraven also helped Ajax reach the semi-finals of the
Champions League where they lost to
Tottenham, after knocking out
Real Madrid and
Juventus in the previous rounds. Sinkgraven was hampered by injuries for a lot of the time, while at Ajax. In his four and a half years at Ajax, he missed 101 games through injury and he was out injured for a total of 738 days.
Bayer Leverkusen On 17 June 2019, Sinkgraven signed for
Bayer Leverkusen on a four-year contract, to rejoin his former Ajax coach
Peter Bosz. On 22 May 2023, Leverkusen announced that it would not be renewing Sinkgraven's contract, making the player a free agent at the end of the
season.
Las Palmas On 11 July 2023, recently-promoted
La Liga side
UD Las Palmas announced the signing of Sinkgraven on a two-year contract. On 2 February 2025, after being rarely used, he terminated his link with the club.
Fortuna Sittard On 3 February 2025, Sinkgraven returned to the Netherlands and signed a one-and-a-half-year contract with
Fortuna Sittard. ==International career==