MTO EXCLUSIVE: Tennis Star SLOANE STEPHENS Is Dating A PROFESSIONAL ATHLETE . . . He's RICH . . . He's HANDSOME . . . And He's BLACK!!! (PICS)

Tennis superstar SLOANE STEPHENS is taking the world by storm after winning the US Open. And we've just learned that the BEAUTY has a boyfriend - soccer stud Jozy Altidore, the Toronto FC forward.

From their social media pages - the two have been dating for TWO years, and appear to be madly in love with each other:

Here's her and her man:

Sloane Stephens has won five WTA singles titles, including her first major at the 2017 US Open that turned her into a household name.