After a wry grin, Sakkari grew serious and walked toward the chair umpire holding up a finger, saying: "If she screams one more time in my face ... No, no, no, no.
One more time and I'm going to speak to the referee."
Taking charge of the situation appeared to work for Sakkari, who duly broke the 18-year-old Russian to take the set, then locked down the match to reach the third round.
"During a match you can be very pumped or, you know, the way that some players celebrate their points, it's not appropriate," Sakkari later told reporters.
Reporting by Ian Ransom in Melbourne; Editing by Peter RutherfordOur Standards: The Thomson Reuters Trust Principles.