Simons initially joined PSG in 2019, having moved to the club from Barcelona's youth academy. He has found minutes hard to come by, though, and was actually sold to PSV in 2022, where he spent a season, before PSG exercised a buy-back clause and subsequently loaned him to Leipzig. The 20-year-old has scored five goals and registered seven assists in the Bundesliga this season but he has only ever made 11 first-team appearances for PSG.