text: Russia Crushes Thailand 3-0 to Stay in World Group  MOSCOW (Reuters) - Marat Safin and Mikhail Youzhny trounced  twins Sanchai and Sonchat Ratiwatana 6-2, 6-1, 6-4 in the  doubles to give Russia an insurmountable 3-0 lead over Thailand  in their Davis Cup World Group playoff tie on Saturday.