Monday August 18th, 2014

Defending champion Rafael Nadal has withdrawn from the 2014 U.S. Open with a wrist injury, he announced on Facebook Monday.

Nadal, the world's No. 2 ranked player, suffered the injury during practice last month, causing him to miss the Rogers Cup in Toronto and last week's Cincinnati Open.

More: Federer wins sixth Cincinnati title

Nadal has won four tournaments on tour this season, compiling a total record of 44-8.

In last year's tournament, Nadal topped Novak Djokovic 6-2, 3-6, 6-4, 6-1 to win the championship. Nadal has won the U.S. Open twice in his career. 

Nadal's inability to compete means that he will finish 2014 with one Grand Slam victory, the French Open. 

More: Serena Williams beats Ana Ivanovic to win Cincinnati, her fifth title this season

Former U.S. Open champion Juan Martín del Potro also will not participate in the tournament after undergoing left wrist surgery in March.

- Scooby Axson

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