[1] Born and raised in Oud-Turnhout, in the Flemish province of Antwerp, Rommens joined Genk's academy from Westerlo when he was nine.
[2] Tuur Rommens was a regular with Genk under-19s, since the 2019–20 Youth League, eventually captaining his side during the 2021–22 edition, as well as the reserve team for that season.
[7] The young left-back made his first team debut on the 27 October 2021 coming on as a halftime substitute for Gerardo Arteaga, during the 6–0 away cup win against Sint-Eloois-Winkel.
[8][9] He made his league debut for KRC Genk on the 16 December 2021, replacing Simen Juklerød at the end of a 4–2 home win against Sporting Charleroi.
[13] Already a Belgium under-17 international,[4][6] he played with the under-19 in 2021, scoring his first goal with the team on the 10 November 2021, during a Euro qualifier game against Azerbaijan,[14] having become a regular starter for the team at left-back,[15] before eventually captaining the Belgian side during the qualifying game against Javi Serrano's Spain.