Serena wants raonic's sleeve

Serena Williams is a fashion maven and big server, so she can appreciate the protective sleeve Milos Raonic has been wearing on his right arm.

What started as a legitimate health need has turned into a bit of a superstition for the fifth-seeded Canadian. Williams just thinks it looks stylish.

"I love your arm sleeve," she tweeted to Raonic on Sunday. "It's super cool and different. Will it help my serve? I want to serve like you. (hash) CanIHaveOne."