World number one Roger Federer put in an uncharacteristic error-filled display in his 100th Grand Slam match but still managed a 7-5 7-5 7-6 (7/2) victory over Fabrice Santoro in the second round of the US Open.

Two 18-year-olds with a world of talent meet in the third round at Roland Garros today when Spaniard Rafael Nadal clashes with Richard Gasquet of France.

Second seed Andy Roddick suffered a shock second-round exit at the hands of unseeded Argentinian Jose Acasuso following a five-set marathon at the French Open in Paris this evening.