Jurgen Klopp said Liverpool's point won at injury-hit Manchester United "could have been more" as they missed a big opportunity to go three points clear at the top of the Premier League.
United were forced to replace three players before the break but frustrated an under-par visiting side.
The point takes Liverpool one point clear of Manchester City at the top of the table with 11 games left to play.
"On days when United are beatable you have to do it," Klopp told Sky Sports.
"We played around with no speed. We expect to play better football. It is a point at United and everybody feels it could have been more.
"United were favourites before the game, then it all changed and all of a sudden we had something to lose, people start to think if we don't beat this team there is something wrong with us. We are all human beings."
There were four injuries in the first half of Sunday's game at Old Trafford, with United losing Ander Herrera, Juan Mata and the latter's replacement Jesse Lingard to injury.
Liverpool were forced to send on Daniel Sturridge for Roberto Firmino, who later left the ground on crutches nursing an ankle injury.
"It was a strange game," added Klopp. "We started really well. All the injuries in the game obviously cost us rhythm. It happened to us with Bobby [Firmino] and that was a catastrophe.
"The boys didn't feel okay. I could see it in their faces. I was thinking, 'what is gong on here today?'. United played with a completely new midfield and three up front. We lost our rhythm and couldn't get it back.
"It was a game without a lot of highlights - it was intense."
On Firmino's injury, the German said: "First he said he could carry on, then that he couldn't. I don't know exactly the extent of the problem."
The Reds will be hopeful Firmino's injury does not sideline him for long, with league fixtures against Watford, Everton and Burnley to come in the next two weeks before they go to Bayern Munich for the second leg of their Champions League last-16 tie, which currently stands at 0-0.
In the league, Liverpool still have to travel to Everton for what could be a heated Merseyside derby in March before welcoming Tottenham and Chelsea to Anfield. Rivals City also host Spurs and face Manchester United at Old Trafford in April.
Since losing to City on 3 January, Liverpool have drawn three Premier League games against Leicester, West Ham and Manchester United.
"It is 100% true that there have been a bit too many draws in the last couple of games but still, we are where we are," said Klopp.
"United are in a fantastic moment but they still have 14 or 15 points less than we have and the good news of today is that didn't change."
As well as the fitness of Firmino, Liverpool will hope top scorer Mohamed Salah can start firing against the big teams. He has netted just once against top six opponents this season (against Arsenal in December).
He failed to make an impact in the goalless draw at Old Trafford but Klopp said he "didn't know" what the problem was.
"I am here to help the players. They want to perform 100% but it doesn't always happen," said Klopp. "Mo knows he can play better than he did today. We know he can."