Road Racing World Championship Grand Prix Anti-doping controls Anti-doping controls were carried out at the Portuguese Grand Prix, held on the circuit of Estoril, on April 17 last. Neither prohibited substances nor markers of the use of prohibited methods were found in the tested samples. The riders controlled were : Marco Melandri (ITA, MotoGP), Valentino Rossi (ITA, MotoGP), Troy Bayliss (AUS, MotoGP), Marco Simoncelli (ITA, 125cc), Mika Kallio (FIN, 125cc), Julian Simon (SPA, 125cc).