Italy cracks down on ex-dopers

ROME -- Alessandro Petacchi, Ivan Basso, Michele Scarponi and Danilo Di Luca are among the cyclists who will no longer be able to ride for Italy at the world championships under new rules adopted by the Italian cycling federation.

The federation approved regulations Thursday preventing any rider who has been banned for doping for more than six months from wearing the national team jersey or competing in a national championship.

Petacchi, Basso, Scarponi and Di Luca all have been banned for longer than six months.

Di Luca had raised a challenge to the new rules before they were ratified, but his appeal was turned down.

The road world championships will be held in Copenhagen in September.