Valente spent three years at Leiria, helping the club achieve successful seasons. In 2002, when Mourinho left to join FC Porto, Valente and club mate Derlei were the first signings he made. Valente repaid Mourinho's faith in him with some good displays as Porto romped to victory in the Portuguese SuperLiga and won the UEFA Cup 3-2 against Celtic. The following season Valente produced yet another excellent season helping his club to the 2003–04 Champions League Final. Porto won the game 3-0 against AS Monaco, and for the second time in two years Valente was able to collect a winners medal.
After Mourinho left for Chelsea, Valente picked up a succession of injuries. In total he only played eight games in the entire domestic season. He returned in time to face Internazionale in the Champions League quarterfinal but could not prevent his team losing 4-2 on aggregate.
After another poor season, which included an ultimatum by FCP president Jorge Nuno Pinto da Costa that ordered him to choose between club or national team, eventually leading to a suspension, he was signed by Everton from Porto on the recommendation of mentor Mourinho at the end of August 2005 when the Merseyside club lost regular left-back Alessandro Pistone to injury.
Valente signed a 1 year contact extension in May 2008 keeping him at Everton until 2009. Valente signs contract extension
Valente was also among the 22 players selected by Luiz Felipe Scolari, the Portuguese National Football Team coach, as part of the squad to face their first Euro 2008 qualifier against Finland in early September 2006. He quickly faded from the international scene, however, and was not a member of Portugal's Euro 2008 squad. On 22/09/2008, tragedy struck. Valente had decided to retire from international football. Thousands of fans were crying at this loss to football. However, rumours are currently flying around that football fans from all over the world are willing to sign a petition for him to change his decision.
Football: VALENTE IN PLEA TO BLUES; EXCLUSIVE: I'd Love a New Contract-Nuno: Valente Contract Plea to Everton
Dec 01, 2006; Byline: By DOMINIC KING NUNO VALENTE today mapped out his two burning ambitions for the season -winning a contract extension and...
Football: Sorrow in Seville; CELTIC 2 Larsson 47 57 FC PORTO 3 Derlei 45115,alenichev 54 O'Neill's Brave Bhoys Beaten but Unbowed UEFA CUP FINAL Aet; 2-2 after 90 Minutes
May 22, 2003; Byline: MARTYNZIEGLER ELTIC'S dreams of tasting European glory again came to a sad end in Seville last night as Porto triumphed...