2020 Australian Open women's odds, picks, predictions: Tennis expert says Serena Williams poised for upset

Gavin Mair is up over $22,000 on his women's tennis tournament picks over the past three years.

No woman has repeated as Australian Open champion since Serena Williams did it in 2009 and 2010. Japan's Naomi Osaka will try to accomplish that feat when the year's first major begins on Monday from Melbourne Park. In a loaded 2020 Australian Open bracket filled with contenders who could win it all, Osaka faces a tall task due to her inconsistency. Of her 15 Grand Slam appearances, she's won two titles while failing to get beyond the fourth round in any other major.

Sportsbooks list 38-year-old American Serena Williams as the 22-5 favorite in the current 2020 Australian Open odds, followed by world No. 1 Ashleigh Barty and Osaka at 9-1. Before making any 2020 Australian Open picks, see the latest tennis predictions from SportsLine expert and handicapper Gavin Mair.

The international guru enters the 2020 tennis schedule on a mind-boggling streak. Not only is he coming off his third straight profitable year, but anyone who has followed his tournament picks during that time is up over $22,000.

Mair is the phenom who called Andreescu winning the 2019 U.S. Open at 20-1, one year after calling Osaka to win that event at 32-1. In last year's French Open, Mair recommended Marketa Vondrousova at 60-1, and she made a stunning run to the final.

Now, Mair has broken down the latest Australian Open 2020 odds and released his coveted best bets to win it all. You can see them all at SportsLine. He doesn't think Williams will break through in Melbourne and tie Margaret Court's all-time record of 24 Grand Slam singles titles.

Williams has not won a major since the 2017 Australian Open, losing four Grand Slam finals in the past two years. In the 2019 U.S. Open final versus Bianca Andreescu, Williams committed 33 unforced errors and put just 44 percent of her first serves in play. 

"While I think it is still fair to expect the veteran American to make a deep run, she has now been a clear second-best in her last four Grand Slam finals," Mair told SportsLine. "I believe there are two factors at play in Williams' struggles to win another major: Against a fellow top-tier player, the 38-year-old Williams is no longer able to match the best level in the world, and she is accumulating mental damage from defeats in the major finals." 

Instead, Mair loves a massive long shot who's "on the cusp of breaking through to win a Grand Slam and looks like an incredible value to do so in Australia." He's only sharing who to back at SportsLine.

So who wins the Australian Open 2020? Which massive long shot stuns the tennis world? Visit SportsLine now to see Gavin Mair's best bets for the Australian Open, all from the acclaimed expert who just predicted Bianca Andreescu would win the U.S. Open at 20-1.