Martina Navratilova quits as coach of world No 9 Agnieszka Radwanska after just four months

Martina Navratilova's brief stint as coach of 2012 Wimbledon runner-up Agnieszka Radwanska is finished. Navratilova, who won 18 Grand Slam singles titles as a player, and Poland's Radwanska, who is currently ranked No 9, issued statements on Friday to announce the parting. They announced in December that they would work together.

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