Mathias Jensen (born 1 January 1996) is a Danish professional footballer who plays as a central midfielder for Premier League club Brentford and the Denmark national team.

[11][12] 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,[12] reported to be £3.5 million.

[15] Jensen made a career high 53 appearances during the 2020–21 season and celebrated promotion to the Premier League with victory in the 2021 Championship play-off final.

[16][17] As a result of suffering a "badly gashed" foot while away on international duty, Jensen missed Brentford's entire 2021–22 pre-season and the first three matches of the regular season.

[22] Entering the final year of his contract, Jensen hired his own personal trainer to work with him daily during the off-season in Denmark and he returned for the 2022–23 pre-season "in incredible shape".

[23] In the process of winning his 23rd cap for Denmark in a Euro 2024 qualifier versus Finland on 23 March 2023, Jensen became Brentford's most-capped international player.

[12] 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.

[12] 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".