Australian Open: Day 6

No. 1 Victoria Azarenka got past American Jamie Hampton 6-4, 4-6, 6-2 to reach the round of 16.

Azarenka dropped a set for the first time in Melbourne. She'll face Elena Vesnina next.

Redfoo from LMFAO looks on from Azarenka's match.

Hampton, 23, had to be treated for back problems and said she has two herniated disks.

No. 6 Juan Martin del Potro lost 6-3, 6-3, 6-7 (3), 3-6, 6-3 to Jeremy Chardy.

Del Potro was looking to stay alive and set up a potential quarterfinal match with No. 3 Andy Murray.

No. 3 Serena Williams beat Ayumi Morita 6-1, 6-3. She'll face No. 14 Maria Kirilenko next.

A fan with obviously confused allegiances watches France's No. 9 Richard Gasquet beat Ivan Dodig 4-6, 6-3, 7-6 (2), 6-0.

No. 7 Jo-Wilfried Tsonga beat Blaz Kavcic 6-2, 6-1, 6-4 to set up an all-French fourth round with Gasquet.

No. 3 Andy Murray beat Ricardas Berankis 6-3, 6-4, 7-5 and hasn't dropped a set yet.

No. 29 Sloane Stephens beat Laura Robson 7-5, 6-3 in a matchup of teen sensations.

No. 10 Caroline Wozniacki took out Lesia Tsurenko 6-4, 6-3 to set up a fourth-round date with Svetlana Kuznetsova.

No. 2 Roger Federer beat Bernard Tomic 6-4, 7-5 (6), 6-1. He'll face No. 13 Milos Raonic in the fourth round.

Tomic, who won his first ATP title in Sydney this year, was the last Australian left in the draw.

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