They travel to Spain for a key group clash, knowing they must draw or win to keep their knockout round qualification hopes in their own hands heading into the final game at home against Young Boys.
"We are playing against a team that can win this title," Parejo said ahead of the game.
"When this (coaching change) situation happens, you are on alert. Their players will bring out their best.
"We expect the best Manchester United of the season, the one that won 3-0 at Tottenham."
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