The 2019 U.S. Open quarterfinals begin Tuesday with No. 3 Roger Federer facing Grigor Dimitrov and No. 23 Stan Wawrinka playing No. 5 Daniil Medvedev. Before you make your picks, you need to see who Sean Calvert is backing.

The famed tennis handicapper is red-hot this year. In March, he took down a huge score on Dominic Thiem winning Indian Wells at 80-1 and then he called Adrian Mannarino's Libema Open title at 25-1.

At Wimbledon in July, Calvert told his followers to grab 3-1 odds on Novak Djokovic facing Roger Federer in the final, adding Djokovic would win it all. The result: Djokovic and Federer cruised into the finals, with Djokovic winning the longest men's singles final in tournament history for his fifth Wimbledon crown. Anyone who followed Calvert's advice was handsomely rewarded.

And, Calvert absolutely owns the U.S. Open. Since 2013, $100 players following his U.S. Open bets are up nearly $7,200!

Now, Calvert has locked in strong picks on Wawrinka-Medvedev and Federer-Dimitrov. Calvert is also betting big on who wins Federer vs. Dimitrov, how many sets it lasts, and the exact score of the first set. You ABSOLUTELY need to see his picks before making any of your own.

So who wins Federer-Dimitrov and Wawrinka-Medvedev? How long does Federer's match last? And what is the exact score of the first set? ... Join SportsLine right now to see Sean Calvert's detailed U.S. Open quarterfinal picks, all from the renowned tennis expert who's up over $7,000 on his U.S. Open bets! -- Use promo code TENNIS to get your first month of SportsLine for a buck!