Under suspicion for doping, Roman Kreuziger has been denied his request to start the three-week Spanish Vuelta on Saturday.
The International Cycling Union will again work with the French anti-doping agency to test riders on the Tour de France.
The International Cycling Union has signed a partnership with Antidoping Switzerland to help it combat doping.
Bradley Wiggins withdrew from the Tour de Suisse with a badly bruised right thigh on Wednesday, a day after crashing during the fourth stage.
IOC president Thomas Bach says he is impressed with the international cycling federation's efforts to stamp out doping.
Former world time trial champion Michael Rogers can race again after cycling's governing body accepted that meat he ate in China likely caused his positive doping test.
Fabian Cancellara of Switzerland won a four-way power sprint to the finish line on Sunday to defend his Tour of Flanders title and clinch one of the year's toughest classics for the third time.
Olympic bronze medalist and three-time world time trial champion Michael Rogers of Australia has tested positive for clenbuterol after racing in China.
Fabian Cancellara of Switzerland has won the 11th stage of the Spanish Vuelta in a time trial, while Vincenzo Nibali of Italy took the overall leader's jersey on Wednesday.
Under pressure to validate his re-election bid, International Cycling Union President Pat McQuaid cited independent legal advice Tuesday to support his nominations from Thailand and Morocco.
No riders tested positive for doping at the Tour de France, the International Cycling Union said Tuesday.
Tour of Turkey winner Mustafa Sayar has been provisionally suspended and faces being stripped of victory after testing positive for the blood-boosting hormone EPO at an earlier race.
Pat McQuaid insists the Lance Armstrong doping affair should not be an issue in his bid to remain president of cycling's governing body.
Pat McQuaid will face one challenger as he bids for a third term as president of world cycling's governing body.
Russian rider Nikita Novikov was provisionally suspended on Friday by the International Cycling Union after testing positive for doping.
Giro d'Italia stage winner Mauro Santambrogio tested positive for EPO from a sample given on the opening day of the race last month and has been temporarily suspended by cycling's governing body.