World No.2 Roger Federer improved his display today against Juan Martin Del Potro but was still not good enough, as the Argentine registered yet another win over the Swiss maestro. This was Del Potro’s second consecutive win over the reigning champion after his victory in Basel. Today Del Potro needed exactly two hours to that win as the Argentine smashed 26 winners, but it was Federer’s 42 unforced errors that were the real difference in the end.

Juan Martin was at the peak of his powers from the go today, the Argentine held his nerve and was incredibly consistent. The former US Open champion had high first serve percentages all through the first set and saved three break points in one game to deny the Swiss there. Roger lost all the crucial points in the set and ended up on the losing end.  He took him 52 minutes to wrap the set up, along with his 11 winners in the set, del Potro was assisted by 21 unforced errors from the Swiss.

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The World No.2 fought right back in the second set. Under the gun, after playing a poor tie-break the Swiss responded by catching Del Potro unaware in the very first game of set two. The Swiss then held onto his serve all through the set to finally take it 6-4. The numbers defined how good Federer was, as the reigning champion won 81 percent of his first serve points and smashed an amazing 15 winners. The Swiss also fired 3 aces en route to the set.

The third set started with Del Potro getting that early break of serve on his first break point of the match. The Argentine then built on it and continued to serve well through the set to finally clinch the set and the match with a 7-6,4-6,6-3 score-line.

With that win Del Potro booked his spot in the semis, by virtue of more sets won than David Ferrer possibly can now. The standing for this group are yet to be determined after Ferrer’s match against Tipsarvic.