Mathijs Tielemans (born 26 April 2002) is a Dutch professional footballer who plays as a defensive midfielder for Eerste Divisie club Excelsior on loan from Vitesse.

[3] Tielemans was born in Veldhoven, North Brabant, Netherlands, and started playing football for local club RKVVO in 2008.

[5] He made his professional debut for Jong PSV on 6 November 2020, playing the full away match against FC Den Bosch in the Eerste Divisie, which they won 2–1, and in which Tielemans provided an assist for Fodé Fofana.

[7] On 24 November, he scored his first professional goal in a 1–1 league draw against Jong Utrecht, heading in the follow-up from Joël Piroe's saved shot.

[10][11] In the 2022–23 season, Tielemans evolved into a key player for Jong PSV and was appointed team captain.