( CNN ) -- World No . 2 Novak Djokovic survived his first big test of Wimbledon 2011 as he overcame crowd favorite Marcos Baghdatis to reach the last 16 of the grass-court grand slam in London on Saturday . The Serbian appeared on course for an easy victory after winning the first set , but the 24-year-old completely lost his cool as his 30th-ranked opponent fought back in the second . Djokovic was given a warning after smashing his racket into the ground three times , a petulant outburst that ensured the Centre Court crowd was firmly behind Baghdatis -- a 2006 semifinalist here after losing in the final of that year 's Australian Open . Djokovic , seeking his first Wimbledon title after his 43-match unbeaten run ended at the French Open semifinals , recovered his poise to triumph 6-4 4-6 6-3 6-4 and set up a fourth-round clash with France 's Michael Llodra . Baghdatis will not feature when the second week of the tournament begins on Monday , but the 26-year-old won plenty of fans with his big-hearted performance as he tested Australian Open champion Djokovic right until the end -- even winning an 18-shot rally despite his tiring legs . `` To pull a win out of this game was great . Today was n't my day totally but when I needed to I played some good shots , '' Djokovic said . He joined world No . 1 Rafael Nadal and Roger Federer in winning through , meaning the top four players are still in the draw following Andy Murray 's victory on Friday . Defending champion Nadal will next play former world No . 4 Juan Martin del Potro in the tie of the fourth round , with the Spaniard completing a straight-sets win over Luxembourg 's Gilles Muller . Resuming the rain-delayed match after winning the opening set 7-6 ( 8-6 ) , Nadal won the next 7-5 in another tie-and then whitewashed his 92nd-ranked fellow left-hander 6-0 in the third . Del Potro , now ranked 21st as he continues his comeback from long-term wrist problems , defeated French 15th seed Gilles Simon 7-6 ( 10-8 ) 7-6 ( 7-5 ) 7-5 . The Argentine had never gone past round two before , but has a great chance of reaching the semis if he can beat Nadal . `` I 'm not lucky to play against Del Potro in the round of 16 , '' Nadal said , adding that the knee problem he suffered on Friday was not serious . `` He 's a very , very tough opponent , one of the best players of the world . When he 's healthy , he 's top-five level normally , so it will be a very tough opponent for me . I have to be playing my best tennis to try to win . '' The winner of their match will face either last year 's runner-up Tomas Berdych or 10th seed Mardy Fish in the quarterfinals . Czech seventh seed Berdych beat Alex Bogomolov Jr. 6-2 6-4 6-3 to leave Fish as the only American left in the men 's draw following Dutchman Robin Haase 's injury retirement at 6-3 6-7 ( 5-7 ) 6-2 1-1 down in their encounter . Federer , seeking to equal Pete Sampras with a seventh Open Era title at Wimbledon , showed he will again be a contender by defeating sometime nemesis David Nalbandian in straight sets . The 16-time grand slam winner has lost eight times to the Argentine , but the Swiss third seed was in control as he triumphed 6-4 6-2 6-4 to set up a clash with Russia 's Mikhail Youzhny . Youzhny , seeded 18th , has now reached the fourth round six times since 2001 following his 4-6 6-3 7-6 ( 7-3 ) 6-3 win over Spain 's No . 16 Nicolas Almagro , but has yet to go further . Fifth seed Robin Soderling reached the quarterfinals last year , but the Swede 's participation ended on Saturday with a shock defeat by Australian teenager Bernard Tomic . The 18-year-old , who lost in the first round in his debut appearance in 2010 , won 6-1 6-4 7-5 to earn a meeting with 2002 semifinalist Xavier Malisse . Ranked 158th in the world , he will become Australia 's new No . 1 after the tournament ahead of 2002 Wimbledon champion Lleyton Hewitt , who was beaten by Soderling in five sets in the previous round . Belgium 's Malisse ended the hopes of Austrian 11th seed Jurgen Melzer , winning 7-6 ( 7-5 ) 6-3 6-0 to qualify for the last 16 for the first time since 2004 . French ninth seed Gael Monfils also crashed out , losing 6-3 3-6 6-3 6-3 to Poland 's Lukasz Kubot . The world No . 93 , a doubles specialist who lost in the second round last year , will next take on Spain 's Feliciano Lopez -- who eliminated three-time runner-up Andy Roddick on Friday . Spanish seventh seed David Ferrer moved into the last 16 for the second successive year as he beat Slovakia 's Karol Beck 6-4 6-3 6-3 . The Australian Open semifinalist will next face French 12th seed Jo-Wilfried Tsonga , who won 6-3 6-4 6-3 against Chile 's Fernando Gonzalez . Llodra , seeded 19th , has already bettered his best performance by passing the second round and will take on Djokovic after his 6-3 6-3 6-1 win over Lu Yen-Hsun , who last year became the first Taiwanese player to reach the quarterfinals . The other fourth-round match sees Murray play French 15th seed Richard Gasquet , who he beat in a five-set thriller at Wimbledon three years ago to reach his first grand slam quarterfinal .
World 's top four men 's tennis players will feature in fourth round at Wimbledon next week . Second seed Novak Djokovic beats Marcos Baghdatis despite losing his temper . He follows No . 1 Rafael Nadal and six-time winner Roger Federer into the last 16 . Fifth seed Robins Soderling suffers shock defeat to 18-year-old Bernard Tomic .