Canas gets another shot at Federer

Karlovic has hit 1,172 aces this season, second only to Goran Ivanisevic8217;s record of 1,477 aces in 1996. Hernandez replaced Nikolay Davydenko after the fourth-seeded Russian pulled out with an elbow injury on Tuesday. Also, wild card Feliciano Lopez defeated David Ferrer 7-6 3, 7-5 in an all-Spanish matchup, David Nalbandian rallied to beat ninth-seeded Tomas Berdych 4-6, 6-4, 7-6 2, and Juan Carlos Ferrero upset 14th-seeded Carlos Moya 7-6 2, 6-4.

Earlier, Federer kick-started the concluding phase of his season, winning his 39th straight match over an American with a 7-6 2, 6-4 defeat of Robby Ginepri. The Swiss tennis supremo turned in a calm, reassuring performance six weeks after last playing on the ATP when he won a fourth straight US Open crown. Federer is in fine-tuning mode with this week and two more events remaining in his season before he and seven other rivals head to Shanghai for the season-ending Masters Cup starting November 11.