Grigor Dimitrov reached the US Open quarter-finals for the first time since 2019 with a five-set victory over Andrey Rublev, whose angry outbursts threatened to mar an enthralling match in New York.
Bulgaria's Dimitrov won the first two sets before surviving a comeback attempt from his Russian opponent to seal a 6-3 7-6 (7-3) 1-6 3-6 6-3 victory.
The ninth seed, who made the semi-finals at Flushing Meadows five years ago, will face Frances Tiafoe or Alexei Popyrin in the last eight.
It is just reward for the 33-year-old for his calm composure as Rublev's antics once again took centre stage in the early stages of the match.