Is it the perfect shot in tennis?

In his match last night with Roger Federer, John Isner put so much backspin on the tennis ball that it bounced back over the net after originally landing on Federer's side.

The 30 year old is know for his amazing serving accuracy and speed but he showed another side to his game in the match against the Swiss maestro. 

Despite the silky skills at Flushing Meadows, Isner lost the Fourth Round match to Federer in straight sets. It finished 7-6, 7-6, 7-5.