Arab Cup Winners' Cup
Sergio transferred to Turkish club Fenerbahçe in 1998–99 season start and then loaned to Sakaryaspor in January transfer window. 1999–00 season start he was loaned again to Al-Ittihad in Saudi Arabia. He won the Arab Cup Winners' Cup with the club. He returned to Fenerbahçe but was loaned again to a few Qatari clubs.