We won't rush to fill Queiroz's boots - Ferguson
Sir Alex Ferguson said he will take his time to appoint a new assistant after seeing Wayne Rooney inspire Manchester United to a 2-0 friendly win at Aberdeen on Saturday.
Ferguson is without a number two at Old Trafford following Carlos Queiroz's departure on Friday for the post of Portugal national coach, the AFP reported.
Queiroz's exit is a big blow for Ferguson, who delegated many tasks to the former Real Madrid coach.
Despite a host of names being linked to the job, such as Laurent Blanc, Brian McClair and former Liverpool assistant Pako Ayesteran, the Scot has vowed to make a considered appointment.
Ferguson said: "There's nobody in mind and no timescale. We take our time on these things because we've got a good staff. We have never made a quick appointment.
"It's always disappointing to lose good men and Carlos was a good man. He was honest and very loyal to me. He was also a very good coach who brought a lot of initiatives that we have acted upon in recent years."
He added: "I knew when Portugal came in for him that it was going to be difficult for us."
United's trip to Aberdeen - their first outing since winning the Champions League in May - resulted in a comfortable win with goals from Michael Carrick and Rooney.
And Ferguson admitted that his former club gave United a perfect work-out in their opening pre-season game.
"It was the first game and quite an open one as well. Both teams had a couple of chances and we needed to defend well at times, so it was a good exercise for us.
"The big thing is boosting the fitness and avoiding injuries - that's the key - and we came through on both fronts.
" Wayne had a couple of chances in the first-half and made some nice runs that could have brought us a couple of goals.
"But he made the goal for the first goal when he won the penalty and then he scored the header in the second-half.
He added: "Gary Neville came through ok, but we gave him just one half because it's always difficult when a player has been out for a year.
"At his age, we didn't want to take any risks and he has come through and that's what is important."
Aberdeen boss Jimmy Calderwood claimed that his players emerged with great credit against Ferguson's experienced outfit.
"United are a fantastic side, there's no denying that. We had a young team out there, but it was a wonderful learning process for them against the quality players that United had out.
"If you look at the older ones, Ryan Giggs and Paul Scholes, their attitude, hunger to win, hunger for the ball and their touch was just fantastic.
"I just thought that my lads did really well against that kind of quality."