Roger Federer has defeated Juan Martin del Potro at the Western and Southern Open . The 15th seed will play American qualifier Alex Bogomolov Jr. , who emerged from a clash with his wild card compatriot Robby Ginepri with a 6-4 6-3 success . Wimbledon semifinalist Jo - Heinz Becker defeated Croat Marin ##ković . There were also wins for Nicolas Almagro and Viktor Troicki .
Roger Federer has defeated Juan Martin del Potro at the Western and Southern Open . Wimbledon semifinalist Jo - Heinz Becker defeated Croat Marin ##ković . There were also wins for Nicolas Almagro and Viktor Troicki .