| Filip Frei | |
| Birth Date: | 2001 1, df=yes |
| Birth Place: | Kilchberg, Switzerland |
| Height: | 1.71 m |
| Position: | Full-back |
| Currentclub: | Radnički Niš |
| Clubnumber: | 20 |
| Youthyears1: | 2017–2019 |
| Youthclubs1: | FC Zürich |
| Youthyears2: | 2019–2020 |
| Youthclubs2: | → AFC Ajax (loan) |
| Years1: | 2020–2022 |
| Clubs1: | FC Zürich |
| Caps1: | 0 |
| Goals1: | 0 |
| Years2: | 2021–2022 |
| Clubs2: | → FC Wil (loan) |
| Caps2: | 28 |
| Goals2: | 0 |
| Years3: | 2022– |
| Caps3: | 22 |
| Goals3: | 0 |
| Nationalyears1: | 2017–2018 |
| Nationalcaps1: | 2 |
| Nationalgoals1: | 0 |
| Nationalyears2: | 2019 |
| Nationalcaps2: | 3 |
| Nationalgoals2: | 0 |
| Club-Update: | 27 December 2023 |
| Nationalteam-Update: | 1 June 2023 |
Filip Frei (born 7 January 2001) is a Swiss professional footballer who plays as a full-back for Serbian side Radnički Niš.
Frei started his career with the youth team of FC Zürich. 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.
He debuted as senior with FC Zürich as an unused substitute in the 2020–21 season. 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.
Serbian club Radnički Niš brought him for trials and ended signing a deal with Frei at the start of the 2022–23 Serbian SuperLiga season. His twin brother, Luka Frei, spent two weeks on trials in summer 2023 with Radnički, but, returned to Switzerland after it.[1]
Frei represented Switzerland at several youth levels.[2]