Barty and Stosur defeated at Madrid Open

Ashleigh Barty let slip a 4-2 lead in the final set to lose to Caroline Wozniacki in Madrid

Defeats to Ashleigh Barty and Samantha Stosur have spelt an end to Australia's hopes at the Madrid Open, in the lead up to the French Open next month.

Barty let a great opportunity to advance to the last-16 of the French Open lead-up event slip away after going down 6-2 4-6 6-4 to world No.2 Caroline Wozniacki.

The Australian world No.18 led 4-2 in the final set of the second-round match but the Dane roared back to break serve, with some good fortune, as she rattled off the last four games to prevail.

"She played extremely well, I thought. She wasn't making any errors at one point," Wozniacki said of Barty.

"I think it kind of turned around when I got that net cord.

"I just kind of stayed in it, and then I served pretty well to close it off."

Wozniacki said after the match, referencing a moment in the seventh game of the decider which helped her break serve.

Barty was ultimately let down by her groundstrokes in crucial stages of the decider as she finished with 54 unforced errors for the match on clay in the Spanish capital.

Wozniacki will next face former French Open semi-finalist Kiki Bertens, who beat Anastasija Sevastova 6-1 6-4.

World No.57 Stosur went down to American Sloane Stephens 6-1 6-3, unable to back-up her hard-fought first-round victory over Russian 13th seed Anastasia Pavlyuchenkova.

"I think I played really well and super consistent, I competed very well so I'm pleased with that," Stephens said.

The ninth-seeded Stephens will meet sixth-seeded Karolina Pliskova, who defeated Victoria Azarenka 6-2 1-6 7-5.

The Czech needed two hours and eight minutes to get past Azarenka, to advance to the third round in Madrid Open for the first time in her career.

Former world No.1 Maria Sharapova's revival is gathering pace as she overcame a tense opening set to beat Romania's Irina-Camelia Begu 7-5 6-1 and claim a first win in her past five matches.

"I played some really tough points," 31-year-old Sharapova said.

I was very aggressive, played deep, returned a lot better. That will certainly help me moving forward."

Unseeded Sharapova will next face last year's finalist Kristina Mladenovic, who edged China's Zhang Shuai 6-4 4-6 6-3.

In other women's matches, French seventh-seed Caroline Garcia beat Petra Martic, Kiki Bertens toppled 15th-seeded Anastasija Sevastova and Julia Goerges defeated Lara Arruabarrena.