Serena harasses Dimitrov on Instagram Live

With just a couple more days left in his 14-day quarantine period in Melbourne, Grigor Dimitrov took to Instagram Live with Vitamin Well and Serena Williams couldn't resist joining in on the fun.

Dimitrov has serve as a brand ambassador for the functional drink brand for just about two years now. The world No. 19 answered some interesting questions from fans about his quarantine in Australia and expressed how fortunate he feels to practice a couple of hours every day.

But things got really interesting when Serena filled the chat with a steady stream of hilarious questions for the Bulgarian.

"Have you ever jumped off a mountain?" Serena asked.

Dimitrov's face lit up with a smile as he began telling a story about Serena and an incident that happened when they visited a theme park together in the past. He revealed that Serena is just a little terrified of rollercoasters.

“You know what? No, I would love it," Dimitrov said. "Actually, me and her and I think some of her sisters went to an amusement park. She gets so scared. If she’s up for it, I would jump off the mountain."

Although Dimitrov answered the 23-time Grand Slam champion's question, she certainly wasn't done intruding. Serena would ask, "What was the last thing you ate? Rapunzel or Cinderella? I heard you use the same underwear and don't wash them?"

"I've waited all day to harass you," Serena wrote at one point during the Instagram Live, but opted not to actually join the live stream.

"We will be reacquainted soon," Dimitrov said.

The two friends will be able to see each other in the coming days as they will soon be released from their respective quarantines. Dimitrov is quarantined in Melbourne, while Serena is with her sister Venus in Adelaide.