David de Gea is doing "special" preparation to deal with Lionel Messi ahead of Tuesday's Champions League quarter-final clash against Barcelona, goalkeeping coach Emilio Alvarez says.
United travel to Camp Nou looking to pull off a comeback after going down 1-0 in the first leg at Old Trafford.
Messi may have drawn a blank in Manchester, but the Argentine star has scored 43 times in 41 games in all competitions this season and is the Champions League's top scorer.
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Well rested after being left out of the Catalan side's 0-0 draw with Huesca on Saturday, Messi will be raring to go as Barca look to keep their hopes of winning a treble of trophies alive.