By Steve Keating AUSTIN, Texas (Reuters) - Williams rejected any suggestion of favouritism or dirty tricks after their departing Venezuelan driver Pastor Maldonado made thinly-veiled accusations against the Formula One team on Saturday. Maldonado, who is leaving after next week's finale in Brazil, qualified only 18th for the U.S. Grand Prix while Finnish rookie team mate Valtteri Bottas put his car in ninth place on the grid. But one more race to go, so great," Maldonado told Britain's Sky Sports television. "It is a question for them." Maldonado has scored the former champions sole point of the season so far and has become increasingly frustrated by their performance. Click here to read full news..