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)
The clubs last met in the Champions League final in 2009 when Lionel Messi inspired Pep Guardiola's men to a memorable 2-0 victory in Rome.
The La Liga champions carried out their pre-season campaign in Asia earlier this year after spending 2008 and 2009 in the US.
Guardiola's men will cross the Atlantic again next summer to play three games in July and August.
Prior to that, Barca will play friendlies in Germany and Croatia against as-yet unknown opposition with the club estimating a potential income of £5million from the matches.
Running battle: Barcelona will take on Manchester United during their pre-season tour of the USA next summer
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