Next matches for me are:
Andrey Rublev VS Marin Cilic.
I support Marin Cilic for the win.
Sam Querrey VS Juan Monaco.
I support Juan Monaco for the win.
Steve Johnson VS John Isner.
I support John Isner for the win.
Now you know your bets you can see where to get the highest odds and biggest payout in bitcoin by checking the odds comparison tables
http://bitcoin-betting-guide.com/odds-comparison-tables/mens-tennis/Marin Cilic 1.25
Juan Monaco 1.47
John Isner 1.3
In each case there is more than 5% difference between the best odds sportsbook and the worst. That is the difference between winning and loosing long term

good luck!