Marion Bartoli needs to be on upset alert.
The second week of Wimbledon 2013 is under way, and Day 8 at the All England Club will feature several intriguing matches.
Through the first week of play there have been numerous upsets that have shaken up the field. Many stars have gone home early, but there are still a few to watch on Tuesday.
Here's the information you need to know before Day 8 begins, and there are also a few underdogs to keep an eye on.
Where: All England Club in London, England
When (via Tennis.com): 7 a.m.-4 p.m. ET on ESPN2
8 a.m.-1 p.m. ET on ESPN
Underdogs to Watch
No. 17 Sloane Stephens (USA) against No. 15 Marion Bartoli (FRA)
With a depleted field, this is Sloane Stephens' best chance to win her first Grand Slam.
Marion Bartoli is 1-0 against Stephens in her career, but that's not enough to say that she knows how to beat Stephens. It's anyone's guess as to how this one will unfold, but this has the makings of the lower seed advancing.
Stephens is playing well in the tournament and has already made it to a Grand Slam semifinal this year. She has gone head-to-head with the best this year and has come out on top. She has a victory over Serena Williams this year.
Bartoli has not lost a set in the tournament. This year's Wimbledon has seen players playing well go down the next round. With a solid opponent in the quarterfinals, Bartoli could be the next victim.
She's had an easier time through four rounds, but Stephens is not going to back down. Keep an eye on Stephens on Day 8.
No. 6 Li Na (CHN) against No. 4 Agnieszka Radwanska (POL)
This would be an upset by seed, not by history.
The two players have split their meetings at Wimbledon in the past, but Li Na has owned Agnieszka Radwanska in their most recent matches.
Na has won four of the last five meetings. Radwanska has won two of the three meetings on grass, but they haven't played on this surface since 2009.
Both players have won a match against the other this year. Na has won the most recent meeting. Only two of the 10 previous meetings have gone three sets, so winning the first set will be crucial for both players.
It's been a pretty even series throughout their history, and it should be another good matchup.
No. 8 Petra Kvitova (CZE) vs. No. 20 Kirsten Flipkens (BEL)
This match will be intriguing given their history, but Petra Kvitova has been tested more in this tournament. She has come out on top and will get past Kirsten Flipkens.
Although Flipkens owns a 2-1 edge in head-to-head matchups, it's a pretty small sample size. She did win the only matchup this year.
If it means anything, they have alternated wins in their short series, which means it is Kvitova's turn to win.
This should be a good match, but Kvitova should be able to pull out a victory.
No. 23 Sabine Lisicki (GER) vs. Kaia Kanepi (EST)
Sabine Lisicki took down Williams on Monday (recap courtesy of Wimbledon's official website). Kanepi has faced only one seeded player in the tournament, No. 7 Angelique Kerber, and won. She doesn't stand much of a chance on Tuesday.
Yes, this tournament has been unpredictable. Beating the top-ranked player isn't a fluke, and Lisicki will be ready to go from the start. She is looking to make it to the semifinals and has the easiest draw of any player.
As crazy as Wimbledon 2013 has been, don't expect Kanepi to pull off the upset.
*All information is courtesy of WTATennis.com.