“I think both my first and second round opponent were really, really great quality tennis players and managed to find a way to win four. That’s what counts in the end.
“Hopefully, I will be able to build this as the tournament progressed.”
Djokovic said he was lucky to win the third set after Popyrin missed a potential winner on set point.
“He had quite an easy forehand and he missed it. I didn’t do anything special. I was lucky,” Djokovic said.
“He was the better player for a set and a half. The momentum shifted in the tiebreak. I put one more ball into the court than he did.
“Credit to him for tactically coming out with the right game plan and serving big. He deserves a round of applause for his performance tonight.”
Djokovic wasn’t asked about his verbal clash with the fan in the fourth set.