Filip Frei (born 7 January 2001) is a Swiss professional footballer who plays as a full-back for Serbian side Radnički Niš.
He called the attention of the AFC Ajax who brought him on loan for the 2019–20 season in the youth team.
In Ajax he made 3 appearances in the 2019–20 UEFA Youth League however, he ended up returning to Zürich.
In order to get more playing time, he accepted a loan move to FC Wil during the next season, which proved to be a right move as he made 28 appearances during the season in the Swiss Challenge League.
[1] His twin brother, Luka Frei, spent two weeks on trials in summer 2023 with Radnički, but, returned to Switzerland after it.