SIR Alex Ferguson insists he will never be short of challenges at Manchester United. The Scot celebrated his 68th birthday, having completed an incredible 23 years in the Old Trafford hotseat. Already the most decorated manager Britain has ever produced, Ferguson shows no sign of losing the drive and hunger that has kept him at the top of his profession, first with Aberdeen, then United, for well over 30 years. Yet Ferguson can always find new challenges. On Sunday, United renew hostilities with Roses rivals Leeds in the FA Cup, a competition the Scot has won five times. But he can always find new challenges. And after recent disappointments, the FA Cup is a prime example. "It is easy at this club," he said. "You have to try and win everything. "You know you don't but if you pick up one trophy a season you have to be happy with that. "It is such a competitive league and a lot of big clubs are trying to get the glory themselves and add to their own success of previous years. "We have targets, the Premier League and the European Cup are the two biggest ones, but you would not discount an FA Cup. "We lost in the last few minutes to Chelsea in the final a couple of years ago. We also lost on penalties to Arsenal in Cardiff a couple of years before that. "Last year we got knocked out by Everton in the semi-final on penalties with a team of young players who didn't deserve it. "But it happened and those young players would love to have that opportunity again." The ability to continually freshen up his squad, and retain a healthy number of youngsters, is one of the reasons why Ferguson's mind remains so active. Ferguson has already decided to unleash a strong side on Leeds, once again declaring an intention to stick with the younger members of his squad for Wednesday's Carling Cup semi-final first-leg with Manchester City. Veteran duo Gary Neville and Paul Scholes are expected to returnafter recovering from a groin injury and hip complaint respectively. Nemanja Vidic and Wes Brown should continue in central defence, while Wayne Rooney will be looking to add to his 15-goal tally for the season. United (from): Kuszczak, Foster, Neville, Rafael, De Laet, Vidic, Brown, Evra, Fabio, Valencia, Park, Carrick, Fletcher, Scholes, Anderson, Gibson, Giggs, Obertan, Rooney, Berbatov, Owen, Welbeck, Tosic. Key opponent: Jermaine Beckford - Banging in goals for the League One leaders Prediction: 3-1 United are too strong despite the huge travelling army from Yorkshire Agree with the prediction? Have your say. Click here for all the latest odds from Betfred.