Andy Murray falls to defeat to resurgent Rafael Nadal at World Finals
Scot faces crucial final group clash against Stan Wawrinka to reach the next stage.
Andy Murray slumped to defeat against a resurgent Rafael Nadal at the ATP World Tour Finals in London to leave his hopes of qualifying hanging in the balance.
The Scot lost out 6-4, 6-1 to the 14-time Grand Slam champion, who continues to show glimpses of returning to top form.
It all started so well for the Dunblane ace as he broke Nadal in the opening game of the match. But the Spaniard hit back immediately with the world number two struggling to hold his serve.
World number five Nadal struck at 5-4 to take the set and put the home favourite under real pressure by taking a 3-0 lead in the second.
Murray put up little resistance and appeared to lack concentration as he lost out at the O2 Arena.
After beating David Ferrer in his group opener, Murray now faces French Open champion Wawrinka for a place in the semi-finals.