Roger Federer has been knocked out from the Tennis Masters cup by a sensational defeat from Andy Murray .
Murray who has already qualified for semi final came from behind to beat the World no 2 and defending champion Roger Federer who has 13 grand slams to his name. The final score was 4-6, 7-6 (7-3), 7-5.
Murray also took he revenge of his defeat in this year U.S open final from Roger Federer.
This defeat continues the bad season for Federer winning just one grand slam in a year and moving still one behind all time record of 14 by Pete Sampras.