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Manchester United faced Real Sociedad in the Europa League round of 16 first leg game.
The Red Devils played a 1-1 as Joshua Zirkzee scored for United, while Mikel Oyarzabal equalised from penalty.
Taking to Instagram, Casemiro shared a message ahead of second leg on March 13.
He wrote: “🔴 Waiting for the second leg with our fans!! #MUFC”