Argentina’s Juan Martin del Potro upset World No. 3 Andy Murray 6-7 (5/7), 6-3, 6-1 to reach the semi-finals of the Indian Wells Masters.
Del Potro, the 2009 US Open champion, on Friday beat reigning US Open champion Murray for just the second time in seven meetings and booked a clash with World No. 1 Novak Djokovic for a place in the final.
Djokovic earlier remained unbeaten in 2013 with a 6-3, 6-1 victory over France’s Jo-Wilfried Tsonga.
The defeat means Murray will have to wait longer for a chance to overtake Roger Federer for the second spot in the world rankings.
Murray could have risen to No. 2 for the second time in his career by reaching the final here after Federer bowed out in the quarter-finals.
But the Scot was undone by eight double faults, the last coming on match point to bring things to a close after two hours and 32 minutes.
Del Potro upsets Murray to reach Indian Wells semis
