United's trip to face reigning Premier League champions Chelsea has been rescheduled for Tuesday, 1 March.
The encounter was initially due to be played last Sunday, but was postponed due to heavy snowfall around Stamford Bridge.
The new date is subject to neither side having an FA Cup fifth round replay to shoehorn into an already tight fixtures schedule. Should both teams exit the competition in the third or fourth round, the fixture could be brought forward to an earlier weekend.
Should the Reds travel to West London on 1 March, however, it will fall amid a series of away games. United travel to Marseille (23 February), Wigan (26 February) and Liverpool (5 March).
Though Sir Alex admits last weekend's postponement perhaps suited Chelsea more than United, with the champions currently struggling for top form, he retains confidence that his side can end a long winless run at Stamford Bridge.
"They were in a bad bit of form and they were probably quite happy to get the game off; that’s one way of looking at it," the manager told his pre-Sunderland press conference. "But at the end of the day it doesn’t matter when we’re going to Chelsea, we’ve got to be confident of going there with the right team to win."
Manchester United to play Barcelona in Washington friendly as part of 2011 pre-season plans.
But the prospect of United and Barca meeting for the first time since the 2009 Champions League final in Rome, which United lost, is likely to prove hugely lucrative for both clubs due to the growing interest in the game in the United States.
With Sir Alex Ferguson’s tour squad expected to be at full-strength due to the absence a major international tournament next year, the club have also received money-spinning offers to tour the Far East, with fixtures in Malaysia, China and Indonesia under consideration.
It is understood that a return to the USA next summer is most likely, however, with Ferguson being impressed by the training facilities throughout the trip, plus the competitive nature of the friendlies played during the three-week tour.
United’s close ties with kit manufacturers Nike, and their Chicago-based shirt sponsor Aon, are also set to influence where the club chooses to tour in preparation for the 2011-12 campaign.
Although United are yet to confirm their pre-season plans for next summer, it was anticipated they would tour the United States once again.
And the announcement on Barcelona's website that Sir Alex Ferguson's men will form one of their opponents for a three-match tour suggests United will also spend an extended period across the Atlantic.
BARCA'S 2011 PRE-SEASON:
21 and 22 July: Audi Cup (Munich)
25 Jul: Friendly (Split)
30 Jul: v Man United (Washington DC)
3 August: v AC Milan (Miami)
6 Aug: v Club America (Dallas