The 2020 U.S. Open begins on Monday from Flushing Meadows, N.Y. Naomi Osaka, the 2018 champ, is the 5-1 favorite, followed by Serena Williams (11-2), Karolina Pliskova (11-1), Sofia Kenin (16-1) and Garbine Muguruza (16-1).

Before you bet, you NEED to see who Gavin Mair picked. He's on a mind-blowing streak. Last year, the famed international tennis expert told SportsLine readers to bet Bianca Andreescu (20-1) to win the title, the year before he had Naomi Osaka (32-1) and in 2017 he had Madison Keys (9-2). That's right -- Mair has predicted three straight outright winners with big payouts!

Morever, anyone tailing his outright picks and in-tournament bets is up a staggering $12,305 in that span.

Now, Mair has broken down the latest U.S. Open 2020 odds from William Hill and released his coveted best bets to win it all.

One huge shocker: Mair wants no part of the favored Williams, even though she has 23 Grand Slam singles titles on her resume. "A series of performances the past couple of weeks have demonstrated the severe decline in Williams' game," Mair wrote, calling her movement "woeful."

Instead, Mair is backing three longer shots, including an ASTRONOMICAL long shot Mair identified when she was 125-1. Now she's been bet down to 50-1 but is still offering extreme value. Mair says this overlooked pro "is having a breakthrough year and "is capable of beating any player on the tour." You NEED to see his picks and analysis before you consider betting this tournament.

Who wins the 2020 U.S. Open? And which MASSIVE long shot stuns the tennis world? ... Join SportsLine right now to see Gavin Mair's best bets for the U.S. Open women's crown, all from the acclaimed expert who has owned this tournament three years running! -- Use promo code TENNIS to get your first month of SportsLine for a buck!