Agnieszka Radwanska has announced that Martina Navratilova is joining her coaching team.
The 18-time grand slam singles champion will link up with the 25-year-old Wimbledon finalist, who is currently ranked sixth in the world.
It means Navratilova, who has also won 31 grand slam doubles titles, is following the trend of tennis stars crossing into coaching in the women's game.
Lindsay Davenport, who won the Australian Open, US Open and Wimbledon during her playing career, has agreed to work with Madison Keys ahead of next season.
Navratilova had previously made no secret of her desire to work with a top player.
So happy to announce @Martina as the newest member of my coaching team!
— Aga Radwanska (@ARadwanska) December 8, 2014