Born in Aryanah, Tunisia, Trabelsi grew up in Sfax, and started his football career with his home town club Sfaxien, where he initially played as a forward. An injury crisis at Sfaxien resulted in Trabelsi playing as a stop-gap right-back, leading to him converting to defence and becoming the team's regular right-back. In 2001 Trabelsi moved to Europe, signing for Dutch club Ajax. During the pre season of 2004, he was given a trial period at Arsenal by Arsène Wenger. Seemingly, he impressed the Gunners and a fee between Ajax and the English champions was agreed. With the transfer looking imminent, even Pro Evolution Soccer 4 included Trabelsi for Arsenal. However, due to personal reasons Trabelsi never fully signed with Arsenal and soon returned home to Ajax. In 2006 Trabelsi was linked with moves to several English clubs, and joined Manchester City on a free transfer on 10 August. Injury and work permit problems prevented him from making his debut until a month into the season, a substitute appearance against Reading on 11 September. He scored his first Manchester City goal against Manchester United with a left foot shot to beat Edwin van der Sar. Manchester City still lost the game 3–1. Trabelsi lost his right-back place in the side to Micah Richards and Nedum Onuoha. Trabelsi did not play a game after City's 1–0 win at Newcastle United in March, and he was released at the end of the season.
International career
Trabelsi made his international debut in May 1998, shortly before the 1998 World Cup. He also played in all of Tunisia's matches in the 2002 FIFA World Cup and 2006 FIFA World Cups, as well as the 2004 African Nations Cup, which Tunisia won. Following Tunisia's elimination from the 2006 World Cup after a 1–0 defeat to Ukraine, Trabelsi announced his retirement from international football at the age of 29, with 61 caps and one goal. He scored his only goal for the national team in 2006 in a friendly match against Ghana.
Attributes
Trabelsi was described as Tunisia's star player in the run-up to the 2006 World Cup. His strongest attributes are generally regarded to be his pace and his agility, though critics have sometimes questioned his commitment.