Rafael Nadal is on track to reach another US Open final, while Alexander Zverev's wait for a major breakthrough goes on.
A third five-set victory in four matches proved beyond Alexander Zverev as he lost in the US Open fourth round to Diego Schwartzman.
There were very contrasting days for Rafael Nadal and Alexander Zverev at the US Open, but both are safely into the second week.
On a day dominated by five-set matches, Rafael Nadal did not even have to play a game to progress at the US Open.
As seeds fell at the US Open, Alexander Zverev and Rafael Nadal advanced at Flushing Meadows.
Stefanos Tsitsipas was sent packing following a shock defeat to Jan-Lennard Struff, while Alexander Zverev joined him out the door.
Rafael Nadal remained on track at the Rogers Cup, but Alexander Zverev and Dominic Thiem were well beaten.
Rafael Nadal, Alexander Zverev and Dominic Thiem moved into the last eight at the Rogers Cup.
Alexander Zverev and Marin Cilic were among the winners on a good day for the seeds at the Rogers Cup.
Alexander Zverev wasted two match points in a semi-final defeat to Nikoloz Basilashvili, who will face Andrey Rublev in the final.