One of the premier hitting partners of recent decades, Sascha Bajin, is off the market once again.

The famed sparring partner has started working with rising sensation Naomi Osaka ahead of the 2018 season.

The former hitting partner to Serena Williams, Victoria Azarenka and Caroline Wozniacki, Bajin announced the news on social media on Tuesday, tweeting a photo of Osaka in training.

Bajin split with Wozniacki shortly after the Dane triumphed at the BNP Paribas WTA Finals Singapore presented by SC Global, calling it an "honor and a privilege" to work with the former World No.1.

"Here are the news guys. Sorry it took so long," Bajin wrote, likely in reference to a series of crypitc social media posts from late November, in which he teased "exciting news" to his followers, and suggested he was already working with a new player.  

Osaka turned 20 in October, ending the season ranked World No.68. The promising Japanese talent was coached by Australian David Taylor, the former coach of Samantha Stosur, last season.