| 
			 
			
			 Defending champion Wawrinka put up only token resistance as his game 
			fell apart in a 55-minute 6-1 6-2 rout at the hands of Bulgarian 
			Grigor Dimitrov on Center Court. 
			 
			World number one Novak Djokovic of Serbia did not face a single 
			break point as he went through with a 6-4 6-0 win over unseeded 
			Austrian Andreas Haider-Maurer. 
			 
			He will meet Croatian eighth seed Marin Cilic who beat Frenchman 
			Jo-Wilfried Tsonga 6-4 7-6(5). 
			 
			Third seed Rafa Nadal, who ruled in Monte Carlo from 2005-12, 
			overcame John Isner, but was given a fright. 
			 
			The Spaniard had to save two set points in the opening set and then 
			found himself pegged back before advancing to the last eight 7-6(6) 
			4-6 6-3. 
			 
			Nadal broke decisively in the fourth game of the third set to set up 
			a meeting with Spanish fifth seed David Ferrer or Frenchman Gilles 
			Simon. 
			
			  
			Dimitrov will face Monfils in the quarter-finals after the French 
			showman, decked out in green and black stripes, saw off second seed 
			Federer in a high-quality contest. 
			 
			Federer, beaten by Wawrinka in last year's final, moved 3-1 ahead 
			courtesy of an early break but Monfils hit straight back and then 
			outplayed the Swiss from the baseline to break again at 4-4 before 
			clinching the opener. 
			 
			The second set went with serve and Federer built a 5-3 lead in the 
			tiebreak before losing four points in a row. 
			 
			"It was not the best end to the match," Federer told reporters. "I 
			should have done better with the break up in the first. I think I 
			did a good job to hang around the second set. I also had chances of 
			my own. 
			 
			
            [to top of second column]  | 
            
			 
      
		
		  
			
			"I never felt like things were really happening the way I wanted 
			them to be going during the whole match." 
			 
			Federer said he would now return to Switzerland to prepare for more 
			claycourt action in Istanbul and Madrid. 
			 
			Wawrinka also looked like he needs some practice. 
			 
			The seventh seed hit 41 unforced errors as he went down tamely. 
			 
			"I don't like losing like that," the 30-year-old said. 
			 
			"The only thing I can do now is accept that I played badly and try 
			to find solutions and try to work on what I need to work on to solve 
			the problems." 
			 
			(Writing by Julien Pretot, editing by Martyn Herman and Pritha 
			Sarkar) 
			
			[© 2015 Thomson Reuters. All rights 
			reserved.] 
			Copyright 2015 Reuters. All rights reserved. This material may not be published, 
			broadcast, rewritten or redistributed. 
			
			   |