Italian veteran Flavia Pennetta bites the net. The 28th-seeded Pennetta had been beating her higher-ranked German opponent, Angelique Kerber, so convincingly in their fourth-round match at the Australian Open on Sunday that when she failed to break Kerber early in the second set, she took out her frustrations by leaning over the net and chomping on the tape. Fortunately for Pennetta - or her dentist, perhaps - she didn't have the need to leave her teeth imprints on anything else. Since returning from a wrist injury last February that caused her ranking to drop as low as No. 166, the Italian has reached her first Grand Slam semifinal at the U.S. Open and now her maiden quarterfinal at Melbourne Park. More...