2003–04 Mersin İdmanyurdu season took over the management of the team. Ufuk Talay was the most appeared player (33), while top goalscorer was Taner Demirbaş (15). In 2003–04 season Mersin idmanyurdu has participated in Second League Category A (the league has been played under the name of "Second League Category A" between 2001–02 and 2005–06; "TFF League A" in 2006–07; and "TFF First League" since 2007–08. Also sponsor names have been included in various seasons.). 18 teams attended in the league. Winners, runners-up and play-off winners were directly promoted to 2004–05 Süper Lig. Bottom three teams were relegated to 2003–04 TFF Second League. Mersin
2003–04 Valencia CF season the mid-season and later made a remarkable comeback ("remontada") in April and May thanks to Real Madrid's several slips. Valencia CF was on course on their first-treble winning season, however, Valencia were eliminated by eventual Copa del Rey runners-up Real Madrid in the quarter-finals and thus denying them a season treble. 2003–04 Valencia CF season During the 2003–04 Spanish football season, Valencia CF won the double of La Liga and the UEFA Cup. At the end of the season, manager Rafael Benítez left to manage English side Liverpool and was succeeded by former Chelsea, Fiorentina and Valencia manager Claudio Ranieri.