Liverpool defender Daniel Agger has conceded title rivals Manchester United are looking very strong.
The Reds currently trail United by two points at the top of the table as they battle for their first title in 19 years.
United's run of eight straight wins has helped them overhaul Liverpool at the summit and Agger admits he has been impressed by Liverpool's arch-rivals.
"I take my hat off to United. They have showed scary strength and have many strings to play on," Agger told Ekstra Bladet.
"They are the most stable and they win the close games.
United can move five points clear if they overcome Fulham in their game in hand and Agger admits Liverpool cannot afford any more slip-ups and must beat United in their clash at Old Trafford next month.
"If we want to keep our chances for the trophy alive we can't draw in so many games," added Agger.
"Manchester United could be five points ahead of us if they win next Wednesday's game against Fulham.
"Because of that we will have to beat them at Old Trafford."