Shanghai Tennis Masters Cup

Juan Martin Del Potro puts his muscle behind the shot [GALLO/GETTY]

Gilles Simon keeps his eye on the ball [GALLO/GETTY]

Andy Murray serves it up [GALLO/GETTY]

Andy Roddick wishes he'd put on a smaller shirt [GALLO/GETTY]

As usual not a hair out of place on Federer [GALLO/GETTY]

Ullyett and Bjorkman whisper during the break [GALLO/GETTY]

Davydenko stretches out [AFP]

No joking for Djokovic as he hits the return [AFP]

Roddick does his best puffer fish impression [GALLO/GETTY]

Andy Murray becomes acquainted with the floor [GALLO/GETTY]

Someone always has to lose, this time it's Tsonga [GALLO/GETTY]