He was in a final of an ATP tournament 15 times and was able to win eight. He celebrated all of his titles on clay courts. In doubles he could not win an ATP tournament, but he was in four finals and at the beginning of his career he won a Challenger tournament in Verona alongside his older brother José (who never reached the top 100).
Clavet won all three Davis Cup matches he competed for for Spain . He defeated both Brett Steven and Mark Nielsen in a 5-0 win against New Zealand in 1999 without losing a set. Against Italy , he won Spain's 4-1 defeat in the individual against Vincenzo Santopadre, which had already become irrelevant for the decision .