Alexander Zverev has won just one title this season, a poor return by his recent standards, but he sped into the China Open last eight.
Serena Williams against Maria Sharapova headlines the best first-round ties at the US Open, but there are plenty of other notable match-ups.
Stefanos Tsitsipas was too good for Australian Jordan Thompson, prevailing 6-3 7-6 (7-4) to book a spot in the last eight on Thursday.
As five seeds fell at the Citi Open, Stefanos Tsitsipas and Nick Kyrgios were second-round winners.
Kevin Anderson was on the wrong end of a Wimbledon upset on Friday, while Novak Djokovic guarded against complacency.
Can anyone follow in the footsteps of Boris Becker or Steffi Graf? We look at this year's Wimbledon teenagers - including Cori Gauff.
Feliciano Lopez ended Felix Auger-Aliassime's run at Queen's as he claimed a 6-7 (3-7) 6-3 6-4 victory on Saturday.
Felix Auger-Aliassime will beat Rafael Nadal, Roger Federer and Novak Djokovic, according to Stefanos Tsitsipas.
There will be a new champion at Queen's Club after Marin Cilic bowed out on a great day for Felix Auger-Aliassime.
Felix Auger-Aliassime was denied a first ATP Tour title by Matteo Berrettini, who won the Stuttgart Open final.