Through four rounds, Roger Federer has played as well as ever -- a scary prospect for everyone else in the draw. Ryan Pierse/Getty Images

Here it is the halfway point of the first Grand Slam, and we've already had a dubious doping scandal, a spitting incident, cracks in Soviet solidarity and enough of those infernal "C'Mawnnns" to last us a lifetime. The good news: With so few upsets there are all manner of tantalizing match-ups awaiting us this week.

Herewith, our midterm grades. This time, marks are dispensed using the Leisure Studies major bell curve.

Midterm grades

A

Roger Federer: Overwhelming favorite has looked as good as ever -- which is saying something -- through four rounds.

Russian women: The Revolution is old news, but like those Marushka Dolls they just keeping coming. Seven Soviettes made it into the Round of 16.

Barbara Schett: Uniformly well-liked, perpetually smiling Austrian calls it a career after a second-round loss.

A -

James Blake: After 2004 annus horribilis, American star makes a graceful re-entry, rolling through two matches and then giving third seed Lleyton Hewitt a run in Round Three.

Marcos Baghdatis: Yes, another Cypriot tennis star. They keep coming, don't they? The talented teen reaches Round Three and, for the second straight Slam, makes Federer work to advance.

Sania Mirza: For all of the talk of the Chinese Revolution, few noticed this 18-year-old from India who won two rounds then took five games from Serena Williams.

Rafael Nadal: But for the pants, he would have had a solid A.

B 

Gael Monfils: This French phenom guy is Tracy McGrady circa '98. Lots of emotional and physical maturity left to do, but is there any doubt he'll be a star some day?

Chinese women: A record number (five) make the main draw but none made it to the weekend.

Lisa Raymond: American veteran loses two games in her first two matches but was forced to withdraw with a stomach injury.

Patrick McEnroe's Davis Cup dance card: Neither Vincent Spadea, Mardy Fish, Robby Ginepri nor Taylor Dent made a particularly strong case for the second singles spot. On the other hand, Andre Agassi appears to be warming to the idea. (And there's always Bobby Reynolds.)

ESPN: There were the usual unforced errors -- Andy Roddick routing Jurgen Melzer on tape delay while Elena Dementieva and Daniela Hantuchova were deep in the third set -- but a generally a strong first week. And is there a more soothing TV presence than Dick Enberg?

C

Carlos Moya: Fourth seed flames out in the first round the same week he "retires" from Davis Cup. Moya is on the short list of tennis' good guys, but his play at Majors has left much to be desired.

Daniel Nestor and Mark Knowles: Top seeds and former champs lose their first match.

Unpredictability: Virtually no significant upsets through the first week.

D -

Claude Eerdekens: The Belgian regional sports minister ought to consider hiring a team of attorneys about now.

Sports Illustrated senior writer Jon Wertheim covers tennis for the magazine and is a regular contributor to SI.com.