Celta completed the signing of Yokuslu from Turkish side Trabzonspor in a deal worth around £5.2million.
“I signed him aged 16 and we played him in the first-team for four years," Hurma said. “He is such an underrated player, he is now at a league where he can get himself noticed.
“He is a player with the ability and mentality to play at the highest level.
“Coaches in Turkey used him as a defender because he is tall, ignoring his midfield and offensive capabilities.
“He is an intelligent, creative midfielder with a wonderful long shot.
“I don't have to get into his defensive strengths.
“He is at a club and a league that appreciate a player with his credentials."