French Open 2012: Biggest Winners from Sunday and Monday

As the second day of the French Open wraps up, we've already seen some upsets and some players taking a little bit longer to win their first-round matches.

From the first-round upset of No. 26 seed Andy Roddick to the retirement of No. 15 seed Feliciano Lopez, we've already seen some of the best players ousted from competition.

Looking through the tournament draw, there are some obvious winners from the first two days.

Here's a look at six of those winners.

Nicolas Mahut

This is an obvious pick since Nicolas Mahut upset Andy Roddick in the first round.

Mahut took three of four sets (6-3, 6-3, 4-6, 6-2) in controlling Roddick throughout the match.

While an early winner in the tournament, Mahut is still on a crash course with No. 3-seeded Roger Federer in the third round.

Florent Serra

Any time your opponent retires in the first set, that's nothing but good news.

For Florent Serra, when No. 15 seed Feliciano Lopez retired after being down 5-0 in the first set, Serra was able to not only move on, but do so without causing much fatigue to himself.

That will help him in his next matchup against Lukasz Kubot, and I see no reason why he won't advance to the third round.

In fact, I think the path for him is open up to the fourth round.

Roger Federer

It's no surprise that Roger Federer won his first-round match.

But, what makes Federer a big winner is the fact that he seems to have an easy path to the quarterfinals.

With Andy Roddick and Feliciano Lopez now out of the tournament, the next time Federer will see a ranked opponent is in the quarterfinals.

Even then, he's looking primed to meet Novak Djokovic in the semifinals.

One thing is for sure, his path to that matchup is looking a lot easier than Djokovic's.

Bethanie Mattek-Sands

Bethanie Mattek-Sands made her two set (6-3, 6-4) victory over 12th-seeded Sabine Lisicki look relatively easy, marking one of the first upsets in the women's draw in the French Open.

Sands came in as a big underdog, with the expectation of getting swept in two-straight sets herself.

But she proved to be up to the challenge.

If she plays that way through the next few matches, I see no reason why she won't find herself in the fourth round, or even the quarterfinals.

Melanie Oudin

Melanie Oudin ended her five-match Grand Slam losing streak with a 6-3, 6-3 win in the first round.

However, she will now face No. 21 seed Sara Errani, who took three sets to win in the first round, 4-6, 6-2, 6-2.

One thing that makes this a win for Oudin is that she won her match with relative ease, while Errani labored a little bit before taking the win.

With her losing streak over, maybe now Oudin can regain that form that propelled her to the 2009 U.S. Open quarterfinals.

Lauren Davis

There's nothing like gaining confidence by manhandling the No. 30 seed in the first round.

For 18-year-old Lauren Davis, she did exactly that, beating Mona Barthel 6-1, 6-1.

In her third-career Grand Slam match, Davis showed great control throughout the match, with only 11 unforced errors.

Dare I say that seventh-seeded Li Na should watch out in the third round?

If Davis plays against Na (assuming she wins her second-round match) the way she did in the first round, she might pull off another upset.