Roger Federer was in clinical mood as he saw off Spain’s Feliciano Lopez in straight sets to join Rafael Nadal in the US Open fourth round.
The third seed, who came through five-set matches in the first two rounds, beat 35-year-old Lopez 6-3, 6-3, 7-5.
Five-time champion Federer, 36, goes on to face Germany’s Philipp Kohlschreiber in the last 16.
“I’m really excited how I feel after two five-setters,” the 19-time Grand Slam champion said.
“It was clearly nice to go up two sets to love for a change. Feels different from there.”
Top seed Nadal earlier beat Argentina’s Leonardo Mayer 6-7 (3-7) 6-3 6-1 6-4 in three hours and 16 minutes.
With heavy rain halting play on the outside courts in the early evening, the action on Arthur Ashe Stadium stretched to almost 15 hours across the day.
Federer and Lopez did not get under way in the night session until 21:40 local time (02:40 BST) – almost three hours later than scheduled – and Madison Keys’ 2-6 6-4 6-1 win over Elena Vesnina ended at 01:46 local time.