Following 2008–09 season-end, Zan could not negotiate a deal with Beşiktaş JK. In 22 June 2009, it had been announced that Zan made a deal with Galatasaray for a period of 2 years starting from 2009–10 season. In further rumours, it has been written on papers that Zan had never been called by Beşiktaş in order to negotiate after his contract had been expired, which was dealt for two years within an optional second season. After 20 days with no proposal from the club, Zan have accepted Galatasaray's offer. On 27 June 2011 he signed a new contract, with €700,000 per annum wage plus €20,000 per game. He scored his first Goal in Galatasary on the second half of the 2010–11 Süper Lig season which came from the 2nd Minute as the game ended in a 1–1 draw against Kayserispor. On the 2011–12 Süper Lig season played he 12 League Matches and scored 2 Goals, one against Eskişehirspor in 2–0 win and the other in a 4–0 win against Ankaragücü. He was part of Galatasaray's champion squad.
Zan emerged as a key man for Turkey in their Euro 2008 qualifying push, starring in seven games for Fatih Terim's side. At the tournament itself, Zan made three appearances after he was initially injured in the opening game against Portugal. He has appeared in two qualifying matches for the 2010 FIFA World Cup.
A tall, commanding central defender who plays with great pride and muscle but lacks agility and football intelligence. Another fault-line is his fragile physical make-up (which earned him the nickname the Glassman), but he has still managed to enjoy a fine career for club and country despite his flaws.