Masters l Del Potro to semis after beating Federer

The Tandil had  two chances  to enter the semifinals box:  beat Federer  or hope that the Serb Janko Tipsarevic  overcomes the Spanish David Ferrer  in the game that ended the group stage. Del  Potro  will have the difficult task of returning to play a semifinal  of the  Masters  to the rival who became his true nemesis: Novak Djokovic. Federer  won the tandilense  13 of the 16 matches  they played so far. However,  the three victories were highly significant Del Potro. The last one took place a few weeks ago in the final of  Swiss Open, played in Basel , the city that gave birth to Federer, and the other two go back to a memorable 2009  U.S. Open final  and match of the group stage of the Masters in London. The game is presented very even, with both players serving with enough precision to not spending constraints. However, Federer had his chance in the eighth game, when Del Potro took 15-40. However, the Argentine recovered and managed to level the account after recovering three breakpoints . Thus came the tiebreaker , where "La Torre" spike up quickly (5-1) to finish defining the strength of its service (7-3) and keep the initial partial 7-6. In the second set, Federer took control from the start thanks to a break in the initial game. Since then he devoted himself to maintaining their own service without spending constraints up to definition 6-4. Del Potro returned pleasantries in the second game of third set, getting a key advantage to face the rest of the game: 3-0. With Federer already qualified, Del Potro had onlymanage a 6-3 advantage to define and render possibilities to David Ferrer, who finally beat  Janko Tipsarevic 4-6, 6-3, 6-1. Thus, the top four of the tournament were defined: in Group A, Novak Djokovic and Andy Murray, and the B, Roger Federer and Juan Martin Del Potro.