[caption id="attachment_16446" align="alignnone" width="580"]Roger Federer thrashed out Dan Evans in straight sets. File Pic Roger Federer thrashed out Dan Evans in straight sets. File Pic[/caption] Internet Desk: Juan Martin del Potro has recorded a shock second-round win to knock fourth seed Stan Wawrinka out of the men's singles at Wimbledon. Del Potro secured a 3-6 6-3 7-6 (7-2) 6-3 victory over the Swiss player. The Argentine is 165th in the rankings after missing more than two years because of injury problems. Del Potro, who is in the same half of the draw as Britain's Andy Murray, will next play either France's 32nd seed Lucas Pouille or American Donald Young. Former US Open champion Del Potro, 27, reached the Wimbledon semi-finals in 2013 but the former world number four is playing in his first Grand Slam since the Australian Open in 2014 after having three wrist operations. He struggled early on as Wawrinka, 31, claimed an early break before comfortably taking the opening set, but Del Potro fought back well to take the second. Both players broke serve twice in the opening four games of a thrilling third set, which Del Potro won in a tie-break, before taking the fourth set to wrap up victory. On the other hand, Roger Federer, who advanced regally into the fourth round despite the best, flickering efforts of the world No.91 from Birmingham. World No.3 comfortably advances in straight sets  beating Evans 6-4, 6-2, 6-2.