ARGENTINA’S Juan Martin del Potro will attempt to deny Roger Federer a sixth consecutive US Open title in today’s final after the victory of his career against Rafael Nadal yesterday.<br /><br />Sixth seed Del Potro, 20, thrashed former world No1 Nadal 6-2, 6-2, 6-2 to reach his maiden Grand Slam final. The Spaniard, who missed Wimbledon with a tendonitis in both knees and has more recently endured an abdominal problem, was overpowered by 6ft 6in Del Potro in little more than two hours. Del Potro said: “I’m very close now to my dream to win this tournament. I hope to do it but I’m so happy to be here in this moment. If I win or lose tomorrow, I think this is the best moment of my life.”<br /><br />Federer, who is aiming to extend his own record to 16 Grand Slam wins, dazzled in defeating fourth seed Novak Djokovic in yesterday’s other semi-final. The Swiss beat the Serb 7-6, 7-5, 7-5, delighting the crowd with an outrageous through-the-legs shot in the final game.<br /><br />Top seed Federer called his trick-shot “the greatest I’ve ever played”, adding: “I had a lot of fun out there.”<br /><br />Meanwhile, world No2 Serena Williams was last night handed the maximum on-site fine of $10,000 (£6,000) for haranguing a lineswoman. <br /><br />Williams was penalised a point, thus losing her semi-final against Kim Clijsters on Saturday night, for shouting at the official, who had called a foot fault. She could yet face further sanctions, while the WTA condemned Williams’ behaviour as “inappropriate and unprofessional”.