WATCH: Serena has a little fun after winning in Toronto

Serena Williams had a little fun with Tennis Channel's Prakash Amritraj, again. During her post-match interview in Toronto, she couldn't help but point out Amritraj's affinity for the gym.

"Just trying to look like you in the gym," Serena said after her 7-5, 6-4 win over Ekaterina Alexandrova.

The two go way back as Amritraj used to compete on the ATP Tour.

Serena talked about her daughter Olympia, and how she's growing up.

"She's a little machine," Serena said. "She has my arms, and she looks like she's in the gym too."

On Friday, Serena will face Naomi Osaka in the Rogers Cup quarterfinals, marking their first meeting since the US Open final last year.