World number two Roger Federer produced a master class performance to defeat a laboured Andy Murray 6-4 6-2 and take a huge step towards the semi-final of the ATP tour World Finals.
Federer dominated throughout and is now all but through to the next round whereas Murray will have to beat David Ferrer on Thursday to have any chance.
It took Federer just two service games to break the Brit and never looked back to take the opening set 6-4 in 36 minutes.
Murray was broken again at the start of the second after some stunning strokes from the Swiss before sealing a resounding win.
Much was expected from the home favourite in the build up as he led the head-to-head record between the two 8-5, winning the last two encounters earlier this year.
But it was clear from the start that Federer was up for the challenge with some magnificent shot making.
After Murray squeezed through his opening service game, Federer held his own serve easily before breaking Murray to love.
Federer had little problems in the rest of the set and came back from 0-30 down in his last service game to win the first set 6-4.
With Murray needing to hit back quickly, Federer continued his superb form and broke immediately.
He then held serve inside a minute before breaking Murray for a third time and wrapping up an emphatic victory.