Kim Clijsters' lookalike sports the same tennis kit, golden hair and blue racquet as the US Open champion but her backhand is somewhat stiffer. That's because she is a doll - the first Barbie to commemorate a female athlete, unveiled at the world's largest toy fair in the German city of Nuremberg Wednesday. Clijsters, 26, was hailed as the poster girl for working mums around the world last year when she became the first mother to win a grand slam singles title since Evonne Goolagong triumphed at Wimbledon in 1980.