Stan Wawrinka of Switzerland loses his grip on his racquet as he hits a return to Kei Nishikori of Japan during their semifinal round match on the twelfth day of the US Open Tennis Championships at the USTA National Tennis Center in Flushing Meadows, New York, USA, 09 September 2016. The US Open runs through September 11. EPA/BRIAN HIRSCHFELD

Kei Nishikori of Japan hits a return to Andy Murray of Great Britain during their quarterfinals round match on the tenth day of the US Open Tennis Championships at the USTA National Tennis Center in Flushing Meadows, New York, USA, 07 September 2016. The US Open runs through September 11. EPA/JUSTIN LANE

Juan Martin del Potro of Argentina (R) pats chair umpire Pascal Maria of France on the head as he plays Stan Wawrinka of Switzerland during their quarterfinals round match on the tenth day of the US Open Tennis Championships at the USTA National Tennis Center in Flushing Meadows, New York, USA, 07 September 2016. The US Open runs through September 11. EPA/JOHN G. MABANGLO

Novak Djokovic of Serbia after tearing his shirt as he plays Gael Monfils of France during their semifinal round match on the twelfth day of the US Open Tennis Championships at the USTA National Tennis Center in Flushing Meadows, New York, USA, 09 September 2016. The US Open runs through September 11. EPA/CJ GUNTHER

This is tennis fan Ron wearing his favorite self spray painted shoes. We found Ron on a bench taking a break between matches. He said he loved his shoes but they got dirty. So he pulled out a can of spray paint and “Wallah”. He said he changed the laces a heap of times but these were his new faves. Ron is so young at heart, he told us he was just 90!

Rob Stone and his Father playing on the Lawns of Westside tennis club. Rob’s first time on those hallowed grounds. Lucky guys. Their heads are blocking out our favorite corner of the Forest Hills Clubhouse.