Novak Djokovic beat Jan-Lennard Struff in straight sets to reach a record-extending 64th Grand Slam quarterfinal while playing through neck discomfort.
Pegula, still yet to drop set, into US Open quarters
Jessica Pegula advanced to the US Open quarterfinals with a 6-1, 6-2 win over Ann Li, remaining undefeated and dropping just 17 games through four rounds.
At 45, Venus Williams returned to US Open singles after two years, losing in three sets to Karolina Muchova while showcasing powerful serves and groundstrokes.