Ali Haydar Şen (born 12 April 1939) is a former president of the Turkish club Fenerbahçe SK.

Şen was born to an ethnic Turkish family in Prizren, Kosovo (at the time Kingdom of Yugoslavia).

[1][2] He worked as a journalist for a short time, before he first came to Fenerbahçe in 1975, when he was made the head of the club's basketball branch.

He had one more spell at the club, from December 1994 through until 1998 with the football side again winning a championship a year after he came to power.

But it wasn't enough to convince Ali Şen, and at the end of the season, both players and Emre Aşık were sacked, leading to huge controversy amongst the club's faithful.