Karen Khachanov claimed his first Masters title at the Paris Rolex Masters last November.
The 11th-ranked Russian will be wearing a Rolex when he returns to defend his title this fall.
More: Isner In, Anderson Out of Delray Beach
Khachanov has signed on as a brand ambassador with Rolex.
"Today is an exciting chapter in my life," Khachanov said in an Instagram post. "I am very honored to announce my partnership with Rolex. I am looking forward to being part of this family which has a long tradition of excellence."
Photo credit: Rolex Paris Masters Facebook