Italy\'s 83rd-ranked Flavia Pennetta advanced to her first Grand Slam semi-final Wednesday by beating 10th-seeded compatriot Roberta Vinci 6-4, 6-1 in a US Open quarter-final at Arthur Ashe Stadium. Pennetta, the fourth-worst ranked of any US Open women\'s semi-finalist ever, will next face the winner of a later match between Belarus second seed Victoria Azarenka and Slovakia\'s 48th-ranked Daniela Hantuchova. Top-ranked defending champion Serena Williams and Chinese fifth seed Li Na will meet in Friday\'s other semi-final at Arthur Ashe Stadium. Source: AFP