Arsenal ##rs Manchester United 2 - 1 in the challenge cup quarter - final on March 9 . Danny Welbeck scored the winning goal for hearts against hearts . Teenager has been criticised after posting racist remarks aimed at fans .
Arsenal beat Manchester United 2-1 in the FA Cup quarter-final on March 9 . Danny Welbeck scored the winning goal for Arsenal against United . Teenager has been cautioned after posting racist tweet aimed at Welbeck .