The goalkeeper remained largely untroubled throughout Saturday’s game and faced just one shot on target - from a curled Reece James free-kick in the first half - throughout the 90 minutes.
For that reason, David felt the Reds would have been worthy winners at Old Trafford, where he admired the work of the men playing in front of him.
“I think for us it is very important to start to keep clean sheets, especially at home,”
the Spaniard told MUTV after the game.
“Today we defended really well, we didn't concede many chances. We always try in every training session to improve, to make the team better defensively, work with each other, and talk to each other.