We're down to the last eight men at Wimbledon, but which of the remaining players will achieve glory at SW19? Will we see another Federer v Nadal final match-up, or can upcoming star Andy Murray or returning great Marat Safin turn the tide of tennis? This is how the quarter-finals line up...

Roger Federer (1) vs Mario Ancic: To say that Ancic has made a superb comeback in the face of adversity would be something of an understatement. Plagued by injury and illness, including a bout of glandular fever only a year ago that seriously threatened his playing career, Ancic is quickly reaching the type of form that brought him into the top 10 of the ATP rankings in 2006.

After an incredible five-set match against 22nd seed Fernando Verdasco, where Ancic came back from two sets down to win 13-11 in the fifth, the talented Croat will be looking for his biggest win to date when he takes on the world No.1.

Ancic can proudly proclaim that he is the last person to have beaten Federer on grass – unfortunately this win came in 2002 and since then Federer has defeated Ancic five times out of five, including a few weeks ago in the French Open third round. Still, Ancic is in the best form he has been in for some time and will be looking to produce the biggest tournament upset so far.

Unluckily for Ancic, Federer is in stellar form again and has yet to drop a single set. The Federer we have grown to admire for his amazing tennis skills looks to be back on court, and it seems as though nothing will stop him from reaching his sixth successive Wimbledon final.

PREDICTION:Federer will be able to produce enough strokes of genius to withstand the Ancic threat. Ancic will no doubt put up a good fight, but Federer should take the match in three close sets.

Marat Safin v Feliciano Lopez (31): Safin has shown that he has the ability to be one of the best players in the world, capable of winning Grand Slams against even the greatest opposition. He has also shown that he can be an inconsistent and emotionally unstable competitor, prone to crashing out in the first or second round of majors.

Safin, a player talented enough to defeat the best in the world on his day, has so far dispatched world No.3 Novak Djokovic and No.9 Stanislas Wawrinka in succession. If the Russian continues playing in such an impressive fashion, it will be hard for Lopez to stand in the way of a great player that is showing an amazing return to form.

Still, Lopez has produced some impressive form of his own, defeating 10th seed Marcos Baghdatis in an epic five-set battle. He is also no stranger to Wimbledon success, having reached the quarter-finals in 2005.

PREDICTION:Lopez holds an impressive 4-1 record against Safin, but it seems he is facing a player who is near unstoppable right now. Lopez will have to come up with something extremely special to stop Safin who should win a close match in three or four sets - and set up an extremely exciting semi-final encounter with Federer.

Rainer Schuettler v Arnaud Clement: Until this week, it seemed we had seen the best of Clement some five to seven years ago, having not made it to a Grand Slam fourth round or better since the 2003 French Open. However, the 30-year-old French veteran has exceeded all expectations and has produced his best singles performance for seven years.

The 32-year-old German Schuettler has also exceeded expectations with some exceptional results, defeating world No.8 James Blake and Serbian Janko Tipsarevic, who toppled world No.6 Andy Roddick in the second round.

PREDICTION: This is most likely to be the most evenly matched of the four quarter-finals, and it is difficult to call a winner. Schuettler has a 3-1 record over Clement and his victories this week have been the more impressive of the two, so I'm picking Schuettler to win a great match in either four or five sets.

Andy Murray (12) v Rafael Nadal (2): British No.1 and world No.11 Murray has truly come of age in this year's championships. He produced what was arguably the best performance of the tournament so far, coming back from a two sets down to overcome 8th seed Richard Gasquet in an absolutely thrilling four-hour, five-set marathon that ended at 9.30pm.

The up-and-coming star has met the expectations of John McEnroe and Bjorn Borg by making the quarter-finals and producing his best ever Grand Slam performance to date.

Nadal has defeated some extremely talented players with apparent ease in the last few rounds, and it looks almost inevitable that he will contest the Wimbledon final against Federer for the third year in a row. This year, more than any before, it looks as if Nadal has his greatest chance of achieving Wimbledon glory and winning the tournament for the first ever time.

The major concern for the Spaniard may not even be Andy Murray, but recurrent injury concerns. Nadal had to call for an injury time-out in his easy fourth-round, straight-sets victory over 17th seed Mikhail Youzhny of Russia but he plays down concerns about potential injuries and insists that he is in top physical shape.

Murray cannot afford to give his opponent a two-set advantage as he did in his last match. However, he is sure to have learnt the lessons of his recent victory and will not give the Spaniard any easy chances. We are bound to witness what should be the most exciting of the quarter-final encounters, with two supremely talented players meeting in a match where both are genuinely confident of their chances.

PREDICTION: This could be Nadal's hardest match for some time and the outcome will really give an indication of how close the 22-year-old is to dethroning Federer. With the crowd solidly behind him, Murray should put in the performance of his life and will push Nadal to the limit.

Nadal has shown no reason so far why he cannot win Wimbledon and, in spite of a superb challenge from Murray, the Spaniard should triumph in a spellbinding encounter. But don't be surprised if it goes to four, or even five sets.

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