World No. 1 Novak Djokovic can add to his record number of Australian Open final appearances when he takes on unseeded Russian qualifier Aslan Karatsev in the semifinal of the 2021 Australian Open. The match is set for 3:30 a.m. ET on Thursday. William Hill Sportsbook lists Djokovic as a -1400 favorite, while Karatsev is going off at +700. 

There are plenty of ways to bet the match, however, including an Over-Under on the total games played at 33.5. Before you lock in any 2021 Australian Open men's semifinal picks, you MUST see who Sean Calvert is backing.

Calvert is the famed handicapper who called Stan Wawrinka winning the 2014 Australian Open at 60-1, the last Australian title won by someone other than Djokovic or Roger Federer. In 2019, Calvert took down a huge score on Dominic Thiem winning Indian Wells at 80-1. And on Tuesday Calvert nailed his two bets in the quarterfinal between Djokovic and Alexander Zverev: first set tiebreak (+180) and Over 41.5 total games (+115). Anyone following his picks is WAY UP!

Now, Calvert has released his best bet for Djokovic vs. Karatsev, a play that would pay out greater than +400! You ABSOLUTELY need to see Calvert's analysis of the 2021 Australian Open semifinal before you bet.

So how does Djokovic-Karatsev play out? And which prop could lead to a HUGE return? ... Join SportsLine right now to see Sean Calvert's top 2021 Australian Open semifinal picks, all from the acclaimed expert who called Stan Wawrinka winning the 2014 Australian Open at 60-1! -- Use promo code TENNIS to get your first month of SportsLine for a buck!