US Open: Nadal hits 50, Federer sets up del Potro clash

Rafael Nadal notched up his 50th win at the US Open to reach the quarter-finals for the seventh time Monday as teen sensation Andrey Rublev and comeback queen Kaia Kanepi muscled into the spotlight.

Nadal

Rafael Nadal of Spain serves against Alexandr Dolgopolov of Ukraine during their fourth round Men's Singles match on Day Eight during the 2017 US Open (AFP)

US OPEN

Switzerland's Roger Federer (L) shakes hands with Germany's Philipp Kohlschreiber after winning their 2017 US Open Men's Singles Round 4 match at the USTA Billie Jean King National Tennis Center in New York on September 4, 2017. Federer won the match 6-4, 6-2, 7-5. (AFP)

US OPEN

Juan Martin del Potro of Argentina celebrates after defeating Dominic Thiem of Austria in their fourth round Men's Singles match on Day Eight of the 2017 US Open (AFP)

US OPEN

Dominic Thiem of Austria returns a shot against Juan Martin del Potro of Argentina during their fourth round Men's Singles match on Day Eight of the 2017 US Open (AFP)

US OPEN

Andrey Rublev of Russia returns a shot against David Goffin of Belgium during their fourth round Men's Singles match on Day Eight of the 2017 US Open at the USTA Billie Jean King National Tennis Center on September 4, 2017 (AFP)

US OPEN

Kaia Kanepi of Estonia reacts after winning her tennis match against Russia's Darya Kasatkina in their Qualifying Women's Singles match at the 2017 US Open Tennis Tournament on September 04, 2017 in New York. (AFP)

US OPEN

Belgium's David Goffin returns the ball to Russia's Andrey Rublev during their Qualifying Men's Singles match at the 2017 US Open Tennis Tournament on September 04, 2017 (AFP)

US OPEN

Daria Kasatkina of Russia celebrates defeating Jelena Ostapenko of Latvia during their third round Women's Singles match on Day Six of the 2017 US Open (AFP)

US OPEN

Feliciano Lopez of Spain returns a shot to Roger Federer of Switzerland during their third round Men's Singles match on Day Six of the 2017 US Open (AFP)

US OPEN

Madison Keys of the US hits a return to Elina Svitolina of the Ukraine during their fourth round 2017 US Open Women's Singles match at the USTA Billie Jean King National Tennis Center in New York on September 4, 2017. (AFP)