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Tennis adopts biological passport for anti-doping

Updated: March 7, 2013, 6:24 AM ET
Associated Press

LONDON -- Tennis is adopting the biological passport program and increasing the number of blood tests as part of a new anti-doping drive that players themselves have demanded.

With the sport under pressure to do more against doping, the International Tennis Federation said Thursday the measures will go into effect this year on both the men's and women's tours in an effort to ensure the game is clean.

The biological passport tracks a player's blood profile over time for any changes ...

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