Coco Gauff is putting in work on the practice court, and making time to perfect her tweener. The 15-year-old called out Roger Federer and Nick Kyrgios, two masters of the trick shot, to review her form.

Kyrgios replied with "goooddd", while Federer can't be blamed for being too busy for twitter as he recovers from arthroscopic knee surgery.

Gauff last appeared at an exhibition match in Delray Beach, where she beat NCAA champion Estela Perez-Somarriba.

Gauff's not the only one in her family picking up global attention. Her father Corey was just named the Professional Tennis Registry's Touring Coach of the Year. He has overseen his daughter's incredible rise, as she won her first WTA title in Linz and climbed to No. 51 in the rankings.

Her father has come on court during WTA events numerous times, playing a big role in his daughter's game. He's also a common figure on the practice court, so he gets some credit for her upcoming tweeners too.