![Aug 12, 2018; Toronto, Ontario, Canada; Rafael Nadal (ESP ) reacts after defeating Stefanos Tsitsipas (not pictured) during the championship in the Rogers Cup tennis tournament at Aviva Centre. Mandatory Credit: John E. Sokolowski-USA TODAY Sports](https://thenational-the-national-prod.cdn.arcpublishing.com/resizer/v2/KRRWHAN2TDUBK7HLYQUJFO7OAE.jpg?smart=true&auth=96ab869ecd10c4263ece9773ebc78846f3c32b8ddb1c19f8baaa11baeb450f72&width=400&height=225)
Rafael Nadal enters the US Open as the world No 1 and defending champion. Reuters
Rafael Nadal enters the US Open as the world No 1 and defending champion. Reuters
US Open predictions: Is Novak Djokovic the biggest threat to Rafael Nadal's title chances?
The fourth and final grand slam of the season begins on Monday as the ATP and WTA Tours arrive at Flushing Meadows in New York