Aus Open: Day Four in pictures

Some glimpses of a hot fourth day featuring second round matches at the Australian Open in Melbourne.

John Isner is on the floor during his second round match against Marcel Granollers. Isner won in straight sets. Photo: Reuters
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France's Gael Monfils plays a forehand with his knees nearly touching the ground. Monfils defeated compatriot Nicolas Mahut to move into the third round. Photo: Getty Images
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Supporters of John Isner catch his wrist band which was thrown to them in celebration after the American won his second round match. Photo: Reuters
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Jelena Jankovic is amused when the plastic covering of her new racquet is not easily removed by her and the ball boy's efforts. She was defeated in the second round by Laura Siegemund. Photo: AP
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Jim Courier (right), the former World No. 1 from USA, greets Andy Murray, after the British player defeated Sam Groth in the second round in straight sets. Photo: Getty Images
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Yaroslava Shvedova looks at the flight of the ball after completing a shot in her match against Madison Keys. Keys won 6-7, 6-3, 6-3 to move into the third round. Photo: Reuters
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Laura Siegemund of Germany reacts after her win over Jelena Jankovic. Photo: Reuters
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Alize Cornet of France puts a towel over her head during a break in her second round match against China's Zhang Shuai. Zhang won 6-3, 6-3. Photo: Reuters
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Stanislas Wawrinka loses the grip on his racquet during his second round match against Radek Stepanek. Wawrinka won in straight sets. Photo: Getty Images
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Children cool themselves under cooling fans at the Australian Open. Photo: Reuters
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