Striker Wayne Rooney will miss Thursday's Europa League second leg tie with Ajax due to a throat infection.<br />Rooney turned up for Wednesday's training session with the club, but was sent home due to the illness.<br />United manager Sir Alex Ferguson said he was resting the 26-year-old in the hope he will be available for Sunday's Premier League game at Norwich.<br />Tom Cleverley is expected to be fit to play 90 minutes after recovering from an ankle injury.<br />"He has a really bad throat. There were traces of it in Amsterdam and we gave him some medication but it got worse," Ferguson said of Rooney.<br />"He has been in bed over the weekend and came in today for the first time and we are trying hard to get him right for Sunday."<br />United go into the game defending a two-goal goal lead over the Amsterdam club from the first leg.<br />But Ferguson, who watched his side blow a two-goal advantage against Basel at Old Trafford in their doomed Champions League campaign, has refused to take anything for granted.<br />He said: "The experience we had against Basel, where we were 2-0 up at half-time, that's in our memories.<br />"I don't think we'll be casual or careless about what we're trying to achieve tomorrow but it's a good lead. You can't dispute that."<br /><br />/football on Youtube brings you the latest football news, transfer rumours and footballing gossip from the English Premier League and European Champions League.