Pete Sampras defeated Andre Agassi 6-4, 7-5 on Monday night at a charity match in New York's Madison Square Garden. Five thoughts and observations about the match:

Love -- From the looks of it, Agassi wanted to win the match, but Sampras needed to win the match. After last year's debacle at Indian Wells, when Agassi mocked Sampras for being cheap and the two got into an uncomfortable on-court discussion, Sampras appeared to realize that while he'll never be as cool or revered as Agassi, he had the trump card: he was a better tennis player. There was a grand sense of satisfaction on Pete's face Monday night as he worked over Agassi and won in straight sets.

15 -- There wasn't even a hint of Indian Wells at the Garden. Both men realize they acted immaturely that night and were keen not to duplicate it again. There was some frostiness in the air, of course. Sampras wasn't joking in a pre-match interview when he said he wanted to kick Agassi's "[expletive]" but both men played it

John McEnroe rolled his ankle while warming up for his Monday night exhibition match against Ivan Lendl and eventually had to retire to his long-time rival despite holding a convincing lead in their eight-game pro set. Though he played nine games and led 6-3, McEnroe teared up after ending the match, the disappointment of quitting in front of his hometown crowd at Madison Square Garden clearly on his face.

But McEnroe wasn't done giving the crowd a show yet. During a post-match interview with his brother, Patrick, the seven-time Grand Slam champion showed the 19,000 at the Garden what he had in store for them after the match: short shorts.

McEnroe wore his "1985 shorts" under his more-modern Nike shorts for the entire match and had planned to strip down to them after defeating Lendl. (And the way it looked on Monday, McEnroe could have defeated Lendl on two busted ankles.) Instead, he had to do so in the post-match interview.

Johnny Mac looks pretty good in the classic shorts. As his

In an interview prior to his Monday night charity match with Pete Sampras, Andre Agassi was asked about the greatest shot in his career.

Speaking with Tennis.com's Steve Tignor, the eight-time Grand Slam champion recalled his over-the-back winner in a 1995 U.S. Open match against Alex Corretja:

"I remember it because they show it a lot, so it sticks in your mind: That shot when I was playing Corretja at the U.S. Open, where the guy hits a lob over my shoulder and Corretja comes to the net, and he thought I was going to let it drop and play something else, and I just literally took it over my left shoulder and I hit it like a bullet. He just didn’t have time to react for it."

Sometimes the Tweener isn't always the best option.

Andre Agassi and Stefanie Graf teamed up with Michelle Obama to film a collaborative public service announcement between the first lady's "Let's Move" campaign and the USTA.

As far as PSAs go, this is an entertaining one, particularly the facial expression delivered by the first lady when she's shushed by the little girl. Although, one can't help but think those two children would be getting more exercise if Agassi wasn't there to retrieve their balls.

The spot debuts Monday night during Agassi's charity match against Pete Sampras and will air through the U.S. Open series this summer.

For the first time since the 2009 US Open, Juan Martin del Potro hoisted a winner's trophy this weekend. The 22-year-old Argentine made the biggest statement yet during his comeback from injury, knocking off Janko Tipsarevic in straight sets to win in Delray Beach.

The victory moved Del Potro up 77 spots in the ATP rankings. After he bottomed out at No. 485 late last year, he's at No. 89 in the rankings released Monday. With a protected injury ranking and wild card appeal, Del Potro won't have to worry about playing qualifiers in order to get into main draws of tournaments, but if he continues to play like he did in Delray, it'll be a moot point and Del Potro will make a return to the top 40 sometime this spring.

Winning a 250 event against a weak field isn't a sign that Del Potro is back though. Rather, it's a good indication that his comeback is going as planned. Del Potro knows that he's building toward a goal, not racing to one.

"I don't know if I'm ready to fight with top-10

A dazzling Serena Williams, sans boot (finally!), made two red carpet appearances in Hollywood on Sunday night. The tennis star attended Elton John's Academy Awards viewing party and then made an appearance at Graydon Carter's Vanity Fair celebration.

Serena began the night at a fundraiser for Elton John's AIDS foundation. The dress was beautiful, if a little "Black Swan"-ish. Venus probably thought it needed to be three feet shorter.

Though Serena holds up her various accessories in this picture, more attention was focused on what she didn't have on her foot. "I finally had the cast taken off a few days ago," Serena told the New York Post. "I have been wearing it for so many months, so I am so happy. My foot feels good and I'm starting to train right away, and I intend to be back for the French Open [in May]."

Timetables for Serena's return are as reliable as Charlie Sheen (zing!), but after months of open-ended responses to the "when are you coming back?" question, it's good to

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Love -- Novak Djokovic advanced to the finals in Dubai courtesy a 6-7 (5), 6-2, 6-4 victory over Tomas Berdych. He'll face Roger Federer, who won his semifinal in easier fashion, cruising in straight sets against Richard Gasquet.

This is the first tournament for both men since the Australian Open. Djokovic, of course, defeated Federer in the semifinals in Melbourne and would go on to win the event.

15 -- Saturday's will be the seventh meeting for the pair in the past seven months. (To put that into perspective, Federer and Rafael Nadal have met seven times in the past three years.) Federer is 4-2 in the recent matches against Djokovic, though in this case two is greater than four, as Nole's wins came in Grand Slams.

30 -- Djokovic is seeking his third consecutive title in Dubai. He's on a 13-match winning streak overall, but said his win over Berdych was a "catastrophe" and his worst match of the

In a post-retirement interview with Belgian TV, Justine Henin reflected on her infamous 2003 confrontation with Serena Williams in the semifinals of the French Open. The seven-time Grand Slam champion said "it is not the best memory," but stopped way short of apologizing for her controversial gesture which led to a Serena collapse.

If your memory needs some jogging, read this post from last May for a refresher on the incident, which actually started on the point before Henin raised her hand. Or watch the clip below. Or do both.

Here's what I wrote about it last year (after Serena defended herself to Jelena Jankovic by telling her "I'm not Justine" following a similar on-court incident):

It wasn't merely bad sportsmanship, it was bad gamesmanship, too. Henin didn't like the previous call, so she let Serena know it by raising her hand and interrupting her serve. Serena's move wasn't very sportsmanlike either, but it didn't warrant such a juvenile, petty and cheap move.

Henin seems to