Roger Federer SUI (2) vs. Wawrinka SUI (19) – MON PM ET

Roger Federer

Roger Federer has struggled with two of his previous matches going five sets with Gilles Simon in the second round and with Tommy Robredo in the fourth round. The Swiss does not look like his dominant self. However, Federer has the ability to play to his opponent’s level.

That could be a dangerous habit against a very focused Stanislaus Wawrinka who toppled Andy Roddick by asserting himself in his most aggressive play in years. The burly Wawrinka is a threat to unseat his gold medal doubles partner. The question is does Stanislaus believe he can do that.

This match has potential for an upset, but until proven differently, Federer is the choice.

Djokovic SRB (3) vs. CZE (6) – MON PM ET

This match has all the makings of a war. Djokovic is rested and Berdych is hot. After Victor Troicki retired after just one set in round three, Djoko cruised through Nicolas Almagro in the fourth round. Djoko reached the finals at the U.S. Open and is the 2008 Australian Open Champion.

Tomaz Berdych has quietly gone about his business. The very fit Czech blew Fernando Verdasco off the court and has plenty of confidence. Berdych is also determined to crack into the top five. Right now, he is clicking all cylinders.

We like the Czech to upset Djokovic whose tendency to start slowly will come back to haunt him tonight.

Nadal ESP (1) vs. David Ferrer ESP (7) – TUES PM ET

Rafa Nadal is so good that he makes the tough matches look easy. The top seed routed fifteenth seed and a very in form Marin Cilic 6-2, 6-4, 6-3. Nadal has yet to lose a set and looks poised to complete his Rafa Grand Slam Sweep.

David Ferrer has held his seed. Spain’s number two overcame Canadian wonderboy, Milos Raonic, in four sets 4-6, 6-2, 6-3, 6-4. Nobody knows how good Nadal is better than Ferrer who barely escaped his first round match against Jarkko Nieminen.

Nadal has no problem here.

Andy Murray GBR (5) vs. Dolgopolov UKR – TUES PM ET

The Scotsman is playing well and has not lost a set thus far. He downed Austrian Jurgen Melzer easily in the Round of Sixteen 6-3,6-1,6-1. Andy Murray reached the finals last year and is playing just as well this year. Murray gets nervous under the bright lights but he’s not there yet.

Alexander Dolgopolov is the only unseeded player to make the quarters in either draw. He earned his berth by breaking down Robin Soderling and the way he did it has people wondering how far Alexander might go. Prior to this match, Soderling had won one ATP tournament and had not lost his serve through nine matches. Dolgopolov broke Soderling 9, that’s right 9, times. This Ukrainian is dangerous, very dangerous.

Murray’s experience should keep Dolgopolov off balance but the challenger can run. Nevertheless, we like Murray.