Marketa Vondrousova tries to become the first teenager to win a Grand Slam title in 13 years when the Czech sensation plays Australia’s Ashleigh Barty in the 2019 French Open final on Saturday. The match begins at 8 a.m. ET from Roland Garros. Vondrousova, 19, is vying to follow in the footsteps of Maria Sharapova, who won the 2006 U.S. Open at age 19. She has not dropped a set in Paris, rallying from an early deficit to beat Johanna Konta 7-5, 7-6 in Friday’s semifinals. Barty, the No. 8 seed, also came from behind in her semi, taking out American teen Amanda Anisimova 6-7, 6-3, 6-3. Bookmakers list Barty as a -156 favorite (risk $156 to win $100) in the latest Barty vs. Vondrousova odds, with Vondrousova getting +132 (risk $100 to win $132) as the underdog. The over-under on total games is 25 and Barty is favored by 2.5 on the game spread. Before you make any Barty vs. Vondrousova picks or 2019 French Open women’s final predictions, you’ll want to hear what SportsLine’s Gavin Mair has to say.

Mair is the international women’s tennis expert who recommended betting Vondrousova at 60-1 to win the title one week before the French Open began. He’s the same expert called Naomi Osaka winning last year’s U.S. Open at 32-1.

Over the past two years, Mair is up an astounding 213 units on his tennis futures picks. That means if you had simply placed $100 on each of those picks, you’d be up $21,300.

Mair knows these players and their tendencies in pressure situations better than anyone covering the tour. After breaking down Barty vs. Vondrousova like only he can, Mair locked in three French Open best bets. He’s sharing them only over at SportsLine.

Mair knows Barty is 2-0 all-time against Vondrousova, with each victory (Cincinnati Masters 2018, Birmingham 2017) coming in straight sets. Barty is the first Australian woman to reach the French Open final since Sam Stosur in 2010. With her lethal backhand slice, Barty has kept every opponent off-balance.

But just because the 23-year-old Barty is ranked much higher and is undefeated against Vondrousova doesn’t mean the Australian will win the coveted French Open 2019 title.

“It has to be highlighted how vulnerable Barty looked for long stretches of that match” against Anisimova, Mair told SportsLine. “Vondrousova, on the other hand, showed remarkable courage as she fought off set points and break deficits in both the first and second set to usurp Johanna Konta. It was a performance of great maturity.”

Not only is Mair picking who wins the 2019 French Open women’s final, he’s also predicting how long the match — and the first set — lasts. You can see all of his picks exclusively at SportsLine.

So who wins the 2019 French Open women’s final? And exactly how long does the match last? Visit SportsLine now to see Gavin Mair’s three best bets for Barty vs. Vondrousova, all from the international expert who backed Vondrousova at 60-1 before the tournament.