Roger Federer fires two huge backhands against Juan Martin Del Potro in Shanghai.

Very nice rally between Roger Federer and Juan Del Potro in Shanghai Masters 1000 semis.

Diego Schwartzman runs everywhere to win that point against Roger Federer in Shanghai.

What a reaction and what a touch on this drop shot from Grigor Dimitrov to drop the ball back against Ryan Harrison in Shanghai.

Highlights of Venus Williams win over Petra Kvitova in quarter finals of the US Open. At 37, the American will play her firts semie at Flushing since 2010.

Here are the 5 best hot shots of this month of August 2017 select by the ATP on the ATP Challenger Tour.