Tennis Shanghai Masters Semifinal; Federer vs. Murray

This is an interesting matchup, and in the previous two encounters between Federer and Murray, (Wimbledon and Olympics) I picked Murray to win both times. However, this time, I'm not going to bet against the greatest player of all time. Typically after grandslams, Murray tends to drop off for a little until the next Masters tournament. Recently retired Andy Roddick, who had the pleasure of playing against Federer in 4 of his 5 Grand Slam appearances said that Federer doesn't get enough credit for grinding out wins; which Federer had ironically done in his epic 2009 final against Roddick, where Federer won 16-14 in the fifth. Both Federer and Murray have not looked great so far this tournament, which means that this match just might go to the person who can grind and dig deeper, which could give Federer the significant edge. In addition, Murray has already won the Olympics and  the US Open this season, and is seemingly content with this, while the veteran Federer is still looking to maintain his #1 ranking. It would be unreasonable to think that Fed won't want revenge after losing to Murray in the Olympics.  FED -121 FOR 2.5 UNITS TO WIN 2.