AP Tennis Headlines At 11:30 p.m.
No. 5 seed Kerber upset, Ferrer advances
Azarenka tops American Hampton in 3 sets
Del Potro loses to Chardy in 3rd round
Stephens tops Robson in matchup of teens
Murray into 19th straight Slam 4th round
Top players criticize Armstrong
Date-Krumm calls longevity 'a miracle'
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