| Del Potro, playing in just his third tournament since an 
				11-month layoff following two left wrist surgeries, held off 
				Pella 6-0 7-6(4) and now faces Federer, who will be playing for 
				the first time since knee surgery last month.
 "We're both coming off injuries but I think it will be a really 
				good match," del Potro told reporters. "I'm going to play my 
				best tennis against Roger."
 
 On Wednesday, del Potro produced some of the tennis that had 
				helped him to number four in the world before he was struck by a 
				succession of injuries, notably to his wrists.
 
 He did not lose a service game and blitzed through the opening 
				set but failed to close the match in the 10th game of the second 
				set where he had match point.
 
 In the tiebreak he won three of the last four points to seal his 
				second round spot after 87 minutes.
 
 In earlier action, Britain's Kyle Edmund survived a tight clash 
				with Czech Jiri Vesely 6-4 5-7 7-6(6) to earn a meeting with 
				world number one Novak Djokovic, who won last week's tournament 
				in Indian Wells.
 
 (Writing by Jahmal Corner in Los Angeles; Editing by Greg 
				Stutchbury)
 
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