Andy Murray has an early start on day four of the US Open, and he drops the first set against Jonas Bjorkman

But Murray, the world number 19, reels off nine games in a row to take control of the match

Bjorkman, who is 15 years older than Murray, fights back and looks the fitter man as the match goes into a fifth set

But Murray finds extra reserves of energy to clinch an early break and Bjorkman finally succumbs

American Laura Granville wilts in the 31C heat of New York's Flushing Meadows

India's Sania Mirza blasts 33 winners and 33 errors as she beats Granville 6-3 7-5

American Bethanie Mattek, known for her wacky outfits, doesn't disappoint - but she loses 6-2 6-1 to Shahar Peer

Svetlana Kuznetsova takes a break in the shade as she comes through her second-round match in three sets

Martina Hingis is two points from going into a third set against Pauline Parmentier before she wins 6-2 7-5

Andy Roddick keeps the fans happy after his second-round match is curtailed by Jose Acasuso's injury

Roddick's coach Jimmy Connors shows his approval after the fifth seed moves into the third round

Maria Sharapova makes her point with a 6-1 6-0 win over Casey Dellacqua in 51 minutes