BEIJING, Dec. 9 (Xinhua) -- Legendary Martina Navratilova will coach Polish tennis star Agnieszka Radwanska after Christmas, the current world No. 6 announced.
Radwanska announced on her Twitter account on Monday night, saying: "So happy to announce @Martina as the newest member of my coaching team!"
Navratilova is a 59-time Grand Slam winner.