• Manchester United manager angry over Gary Cahill tackle• FA rules he was within his rights to criticise Darren CannSir Alex Ferguson is unlikely to face a disciplinary charge over his criticism of the linesman Darren Cann in Manchester United's 3-3 draw at Chelsea on Sunday.Ferguson's joy at seeing his team come back from 3-0 down was tempered by his anger at Cann's decision not to flag for a foul by Gary Cahill on Danny Welbeck after the United striker raced through the home defence in the first half.The United manager thought the Chelsea debutant Cahill should have been sent off as he was the last man.Ferguson said after the match: "They ...