Terim gained hero status by guiding Galatasaray to a UEFA Cup and UEFA Super Cup double in 2000, making them the first Turkish side to win European trophies. The 68-year-old former Galatasaray defender rejoined the club as manager for a third time in 2017 after spells coaching the national side and in Serie A with AC Milan and Fiorentina.
He led Galatasaray to two more championship titles, increasing their record haul to 23.
The club finished an agonising second last season, level on points with eternal Istanbul rivals Besiktas, but losing the title on goal difference. But their form has been dire this season, with three losses in the last five matches leaving them stranded in 12th place and closer to the relegation zone than another title.