The 2021 French Open begins on May 24 and Rafael Nadal will face an opportunity to add to an already overwhelming legacy. Nadal is the all-time leader in career victories at Roland Garros, claiming 13 titles, and enters the French Open 2021 bracket as the betting favorite once again. Nadal is -120 according to the latest 2021 French Open odds from William Hill Sportsbook. He is joined in favorite status by world No. 1 Novak Djokovic, who is +300 to win the 2021 French Open. Before you make any 2021 French Open picks for the men's champion, you need to see who Sean Calvert is backing.

Calvert is the famed handicapper who called Stan Wawrinka winning the 2014 Australian Open at 60-1. In 2019, Calvert took down a huge score on Dominic Thiem winning Indian Wells at 80-1, among many stunning calls. Anyone following his picks is way up.

Now, Calvert has scrutinized the latest French Open 2021 field and released his coveted best bets to win it all. He's sharing all his picks and analysis at SportsLine.

There is plenty of debate about Nadal's value as the favorite, but Calvert sees no value in Daniil Medvedev. The No. 2 player in the world, Medvedev scuffles considerably on clay and, while his odds reflect that at +2500, they aren't high enough. Medvedev was quoted as saying, "Honestly, there's nothing I like on clay" earlier this year, and Calvert is fading him.

Though the draw is still to come and could shift the balance of power, Medvedev is listed with modest odds for a reason. His lack of clay court success is well-documented and there are other places to find value.

Calvert loves several long shots, including one who would pay out in a big way. He is "peaking at the right time having missed much of the early season due to injury," Calvert said. He's sharing who it is, and all of his picks, here.

So who wins the 2021 French Open? And what enormous long shot could take the crown? Visit SportsLine now to see Sean Calvert's bets for the 2021 French Open, all from the renowned tennis expert who called Wawrinka winning the Australian Open at 60-1.