![epa06143310 Roger Federer of Switzerland leaves the court after he loss against Alexander Zverev of Germany during the ATP Rogers cup men's final in Montreal, Canada, 13 August 2017 EPA/ANDRE PICHETTE](https://thenational-the-national-prod.cdn.arcpublishing.com/resizer/v2/DEW5U2F5PSOFNHEYODC6KGZ6KU.jpg?smart=true&auth=6e1d4c6ac96b2f47df9d36b3f328e7aae477441013e8802ce33658b78899bbba&width=400&height=225)
Roger Federer injured his back during his run to the Montreal Masters final. Andre Pichette / EPA
Roger Federer injured his back during his run to the Montreal Masters final. Andre Pichette / EPA
Rafael Nadal assured of return to world No 1 after Roger Federer withdraws from Cincinnati Masters