Former world number one Novak Djokovic was pleased with his 6-2 6-3 6-3 round-three win against Richard Gasquet in New York on Saturday.
Novak Djokovic was a class above on Arthur Ashe Stadium, continuing his quest for a third US Open crown with a 6-2 6-3 6-3 victory.
Maria Sharapova and Naomi Osaka were notable winners at Flushing Meadows on Saturday as Angelique Kerber and Petra Kvitova suffered exits.
Nick Kyrgios was his usual flamboyant self against Roger Federer, who did not mind seeing his serve imitated by the Australian.
It looked as though Roger Federer and Nick Kyrgios might enjoy an epic battle, but the Australian faded badly after losing the first set.
Each of Naomi Osaka's last two matches at the US Open have lasted just 50 minutes.
Nick Kyrgios delivered another frustratingly hit-and-miss display and was comfortably beaten by Roger Federer in the last 32 of the US Open.
Andy Murray was unhappy at an exchange between Fernando Verdasco and his coach, but Marcos Baghdatis says US Open officials are to blame.
Rafael Nadal eventually outlasted Karen Khachanov at Flushing Meadows, where the likes of Milos Raonic and Kevin Anderson also won.
Serena Williams dominated elder sister Venus in straight sets under the Arthur Ashe Stadium lights in New York on Friday.