Bruno Fernandes has admitted that he is wary of the threat a wounded Liverpool side will pose Manchester United in the FA Cup, while insisting "big players can show in every moment".
Liverpool and United are set to do battle for the second time in seven days at Old Trafford on Sunday.
The two teams played out a dull 0-0 draw at Anfield in the Premier League last weekend, but fireworks will be expected when they meet again in the world's oldest national football competition.
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Liverpool are coming into the fourth-round tie on the back of a surprise defeat at home to Burnley which left them trailing the Red Devils, who beat Fulham in midweek, by six points in the top-flight standings.