In a statement, Antalyaspor said on Tuesday that following talks between the club board and midfielder Sahin, the 33-year-old was appointed as the senior team's coach.
On Monday, Antalyaspor sacked Turkish manager Ersun Yanal for poor results in the league.
German-born Turkish player Sahin is a Borussia Dortmund product and veteran, spending the majority of his career in the German Bundesliga club.
He was a Real Madrid midfielder in the 2011-12 season.
In his football career, Sahin also had 52 caps for the Turkish national team.
Separately, Sahin was admitted to Harvard Business School for sports management in 2018, while playing for Dortmund.
He combined football and education.
Famed professor Elberse is an "expert on the business of entertainment, media and sports" at Harvard.
Sahin completed this program in the same year.
Known for his passing ability in the center of the park, Sahin joined Antalyaspor in 2020 and has a contract with this club as a player until June 2022.