Mathias Jensen

Nordsjælland

A midfielder, Jensen progressed through the academy at Nordsjælland and signed a three-year professional contract in January 2015. He was promoted into the first team squad for the 2015–16 season and made five appearances during the campaign, scoring one goal, which came in a 2–2 draw with Randers on 1 May 2016. Jensen was a regular in the 2016–17 season, making 22 appearances, before 2017–18 proved to be his breakthrough season. He made 36 appearances, scored 12 goals, was awarded the captaincy and his achievements were recognised by the DBU and his club, with the DBU 2017 Talent of the Year and FC Nordsjælland Player of the Year awards respectively. After three early 2018–19-season appearances, Jensen departed Nordsjælland in August 2018. During just over three seasons as a professional at Farum Park, Jensen made 66 appearances and scored 15 goals.

Celta Vigo

On 8 August 2018, Jensen moved to Spain joining La Liga club Celta Vigo on a five-year contract. During an injury-affected 2018–19 season, he made just six appearances and left the club in July 2019.

Brentford

2019–2021

On 10 July 2019, Jensen moved to England signing with Championship club Brentford on a four-year contract, with the option of an additional year, for an undisclosed fee, reported to be £3.5 million. He made 43 appearances and scored one goal during the 2019–20 season, which ended with defeat in the 2020 Championship play-off final. Jensen made a…

Jensen made 30 appearances and scored 3 goals for Denmark between U18 and U21 level. He was a part of Denmark's squads at the 2017 and 2019 European U21 Championships and captained the team in the latter tournament. Jensen was named in the senior team's preliminary 35-man squad for the 2018 World Cup, but he was not included in the final squad. In October 2020, Jensen won a late call-up to the full Denmark squad for a series of three matches, as a replacement for injured Brentford teammate Christian Nørgaard. He made his full international debut with a start in a 4–0 friendly win over the Faroe Islands on 7 October and scored his first full international goal on his fifth cap, in a 8–0 2022 World Cup qualifying win over Moldova on 28 March 2021. Jensen was named in the Denmark squad for Euro 2020 and he appeared as a substitute in each of the six matches during the Danes' run to the semi-final. Jensen was named in Denmark's 2022 World Cup squad and made two appearances prior to the team's group stage exit. Jensen was named in Denmark's Euro 2024 squad, but was an unused substitute in each match prior to the team's round-of-16 exit.

Jensen has been described as a "player who can dictate the game", "has a great passing ability" and "a great football brain". Midway through the 2022–23 season, he remarked that while he has "always been a technical player who doesn't really enjoy the big tackles", he had developed his "aggression" and "adapted to the tempo of the Premier League".

Jensen is a Manchester United and Barcelona supporter.