The hilarious incident that took place during a Shanghai Masters match was caught on camera and quickly went viral.
The win didn't come easy for Zverev who defied illness to join Roger Federer and Novak Djokovic in the next round.
The 21-year-old Zverev fought off a cold -- he has had a sore throat and blocked nose for a few days -- and the raw power of Basilashvili, winning 7-5, 6-4.
Zverev said that Basilashvili, who is up to a career-high ranking of 23, "knows how to play, definitely".
"Probably the hardest-hitting player I have ever played against," said Zverev.
Meanwhile, Zverev said on Wednesday that he will not play in the new-format Davis Cup finals in November 2019 because he needs the time off, calling the scheduling "crazy".
"Because in November I do not want to play tennis anymore," the world number five said.
"I think all the top guys will say the same thing. We have one and a half months off in our season, and that's end of November and December.
"Making a tournament end of November which is 10 days playing and competing, it's crazy.