PARIS (AP) -- Women to watch at the French Open, where play begins Sunday:

SERENA WILLIAMS

Ranked: 1

Age: 31

Country: United States

2013 Match Record: 36-2

2013 Singles Titles: 5

Career Singles Titles: 51

Major Titles: 15 - French Open ('02), Wimbledon ('02, `03, `09, `10, `12), U.S. Open ('99, `02, `08, `12), Australian Open ('03, `05, `07, `09, `10)

Last 5 French Opens: `12-Lost in 1st Round, `11-Did Not Play, `10-QF, `09-QF, `08-3rd

Topspin: On a career-high 24-match winning streak that includes titles on European red clay at Madrid and Rome. ... Was also unbeaten on clay heading to the French Open a year ago, when she was stunned in the first round by 111th-ranked Virginie Razzano of France. That is Williams' only first-round loss in 50 career Grand Slam tournaments. ... Since that match, Williams is 67-3, a run that includes championships at Wimbledon, the U.S. Open, the London Olympics and the season-ending WTA Championships.

MARIA SHARAPOVA

Ranked: 2

Age: 26

Country: Russia

2013 Match Record: 30-4

2013 Singles Titles: 2

Career Singles Titles: 29

Major Titles: 4 - French Open ('12), Wimbledon ('04), U.S. Open ('06), Australian Open ('08)

Last 5 French Opens: `12-Won Championship, `11-SF, `10-3rd, `09-QF, `08-4th

Topspin: The defending champion's .816 career winning percentage on clay courts (93-21 record) is the highest among active players, according to the WTA. Not too shabby for someone who once likened her problems moving on the surface to a "cow on ice." ... Completed a career Grand Slam by beating Sara Errani in last year's final at Roland Garros; also her first major championship since right shoulder surgery in 2010. ... 11-1 on clay this season, including title at Stuttgart; loss came against Williams in the final at Madrid.

VICTORIA AZARENKA

Ranked: 3

Age: 23

Country: Belarus

2013 Match Record: 22-2

2013 Singles Titles: 2

Career Singles Titles: 16

Major Titles: 2 - Australian Open ('12, `13)

Last 5 French Opens: `12-4th, `11-QF, `10-1st, `09-QF, `08-4th

Topspin: French Open is the only major tournament where she hasn't reached at least the semifinals. ... Has made great strides on clay, going 33-9 over the past three seasons, after starting her career 36-24 on the slow surface. ... Beat Williams on a hard court in final at Doha, lost to her on a clay court in final at Rome. ... Was ranked and seeded No. 1 in Paris last year. ... When she won the Australian Open in 2011, was the fourth consecutive first-time women's Grand Slam champion. Since then, though, Azarenka, Williams and Sharapova have added their major totals.

AGNIESZKA RADWANSKA

Ranked: 4

Age: 24

Country: Poland

2013 Match Record: 24-7

2013 Singles Titles: 2

Career Singles Titles: 12

Major Titles: 0 - Best: F, at Wimbledon ('12)

Last 5 French Opens: `12-3rd, `11-4th, `10-2nd, `09-4th, `08-2nd

Topspin: Pulled out of clay-court tuneup in Brussels, citing right shoulder injury. ... Comes to Roland Garros in something of a slump, with three losses in a span of four matches. ... Never made it past the fourth round of the French Open, but her patient game of spins and angles could eventually help her break through. ... Began year with 13 match wins in a row, all on hard courts.

LI NA

Ranked: 6

Age: 31

Country: China

2013 Match Record: 21-6

2013 Singles Titles: 1

Career Singles Titles: 7

Major Titles: 1 - French Open ('11)

Last 5 French Opens: `12-4th, `11-W, `10-3rd, `09-4th, `08-DNP

Topspin: At 2011 French Open, became the first tennis player from China to win a Grand Slam singles championship. ... Also has reached two other Grand Slam finals, both at the Australian Open, in 2011 and this year. ... Her run to the title match in Melbourne in January marked by far her best showing at a major tournament since her championship in Paris; she hadn't made it past the fourth round anywhere in between, including one first-round loss and two second-round exits.

ANA IVANOVIC

Ranked: 14

Age: 25

Country: Serbia

2013 Match Record: 18-10

2013 Singles Titles: 0

Career Singles Titles: 11

Major Titles: 1 - French Open ('08)

Last 5 French Opens: `12-3rd, `11-1st, `10-2nd, `09-4th, `08-W

Topspin: Hasn't been past the fourth round the last four years at Roland Garros, but showed she can play well in Paris by reaching two consecutive French Open finals (runner-up in 2007, champion in 2008). ... Her .781 winning percentage at the French Open (25-7 record) is significantly better than her .691 mark at the other Grand Slam tournaments. ... Sometimes-shaky serve could be the key to success for her: She has 88 aces this season, 109 double-faults.

SLOANE STEPHENS

Ranked: 17

Age: 20

Country: United States

2013 Match Record: 15-12

2013 Singles Titles: 0

Career Singles Titles: 0

Major Titles: 0 - Best: SF, at Australian Open ('13)

Last 5 French Opens: `12-4th, `11-1st, `10-DNP, `09-DNP, `08-DNP

Topspin: One of only two women (Azarenka is the other) to beat Williams this season, upsetting the American in the Australian Open quarterfinals in January, before losing to Azarenka in the semifinals. ... Despite success in Paris a year ago, has not played particularly well on red clay this season so far. Trying to get her game in gear on the surface at a tuneup tournament in Brussels this week, Stephens lost her second match.