After parting ways with Caroline Wozniacki, Sascha Bajin has joined Naomi Osaka's camp as her hitting partner. Bajin left Wozniacki's team in November.

The Dane enjoyed one of her career-best year with the WTA Finals trophy and a year-end No. 3 ranking.

Bajin has previously worked with Victoria Azarenka, splitting with her when she entered her maternity leave:

Before then, the Serbian was the long-time hitting partner of Serena Williams:

 

Team Williams on way to Melbourne.. I'm doing everything to heal up and #winfromwithin

A post shared by Serena Williams (@serenawilliams) on

Bajin now gets to face a new challenge in 20-year-old Naomi Osaka. She finished the year ranked No. 68, but has proven to have the game to be ranked far higher with wins over Angelique Kerber and Venus Williams.