 During 2004 , Federer won three Grand Slam singles titles for the first time in his career and became the first person to do so since <unk> <unk> in 1988 . His first major hard @-@ court title came at the Australian Open over Marat Safin , thereby becoming the world No. 1 for the first time . He then won his second Wimbledon crown over Andy Roddick . Federer defeated the 2001 US Open champion , <unk> Hewitt , at the US Open for his first title there . 
