Liverpool boss Rafa Benitez is aware of comments from Chelsea captain John Terry about his squad.
Terry claimed Liverpool were a far weaker proposition without star duo Steven Gerrard and Fernando Torres.
"As a manager you know that sometimes there will be good moments and bad moments, and at this time we know that we have to improve," Benitez said. "But it is only a matter of time. If we win a game then everything changes.
"This game against Manchester United is just the right opportunity. It is a massive game, the fans will be right behind us from the first minute to the last.
"When people (John Terry) talk about our squad not being strong enough, I maintain that we are better than people think.
"If we have half a dozen players who are injured, then things will be difficult.
"If you take five players out of United, Chelsea or Arsenal, it will be very difficult for them to win games. The best way to regain confidence and to improve our situation is to beat Manchester United."