A judge has rejected disgraced teenage Pakistan cricketer Mohammad Amir's claim that he was only involved in fixing one match. Fast bowler Amir, 19, pleaded guilty to plotting to bowl deliberate no-balls in the Lord's Test against England last summer - but insisted this was "an isolated and one-off event". However, Mr Justice Cooke ruled at London's Southwark Crown Court on Wednesday that text messages sent from shadowy contacts in Pakistan suggest the young cricketer was also implicated in fixing during the earlier Oval Test. Amir's lawyers agreed a basis of plea with prosecutors when he admitted conspiracy to cheat and conspiracy to accept corrupt payments at a pre-trial hearing in September.