Wimbledon midterm grades

Spanish Armada: Rafael Nadal, David Ferrer and (Andy Roddick killer) Feliciano Lopez all remain.

Caroline Wozniacki: The top woman's seed may have -- all together now -- never won a Slam. But she's looked sharp here, losing no more than three games in any set.

Young guns: Believe it or not, there will still be champions when Federer, Nadal and the Williams sisters retire. Candidates Sabine Lisicki, Bernard Tomic, and Petra Kvitova are still alive, while Grigor Dimitrov and Ryan Harrison are not but acquitted themselves well.

Waterworks: Serena cried when she won her first match. Lisicki cried when she upset Li Na. Dimitrov cried when he lost to Tsonga. Never mind the roof. We need tarps.

Sportsmanship:First there's this clip. Then, who else notices the trend of players telling their opponent whether or not it's advisable to challenge calls?

WERTHEIM: Day 6 Podcast

The Williams sisters: Both drop sets in early matches and look rusty at times. But they're both still around which is all that ultimately matters.

Kimiko Date Krumm: Couldn't quite close out Venus Williams in round two. But a lot of players and ex-players must take note when a 40-year-old plays at this level.

Fernando Gonzalez: Chilean veteran falls to Jo-Wilfried Tsonga in round three. But nice to see him back.

Bethannie Mattek Sands: Love the outfit and eye black accessory. Less dashing was the tennis, an early exit to a Japanese qualifier.

John Isner: American beats Nicolas Mahut in the unlikely rematch in 2:30 -- more than nine hours less than it took last time. Then Isner loses a winnable match to Nicolas Almagro.

Li Na: Squanders match points in losing to Lisicki. Now she can concentrate on Li Na Inc. for a while, capitalizing on her French Open success. Already, an exhibition in the Beijing Water Cube is in the works.

Sam Stosur: A top-five player last year, Stosur won seven games in round one against a player ranked outside the top 50. Just a dismal, dismal result.

Vera Zvonarev: A finalist last year, second seed bows meekly to Tsvetana Pironkova.

Milos Raonic: Though no fault of his own. What a disappointing European stretch. Slated to play Nadal in round three, the Canadian slips on the grass and ends up in the hospital with a thigh injury.

The scheduling committee: True, the process is fraught to begin with. And true, no matter what happens, there's no way to please everyone. But why commit the unforced error of putting Serena Williams -- a four-time champion -- on an outer court. Just baffling.