Unai Emery's side has scored the most goals in the league this season after champions Manchester City.
The two unbeaten sides are now on the same 20-point mark as Chelsea, which coasted to a 3-0 win at Southampton earlier in the day.
Mahrez has now missed five of his past eight Premier League penalties - one for City and four for his previous club Leicester City - and seems highly unlikely to be given another chance after blasting the ball over the bar in the 86th minute.
Those worries are surely premature, with the intense nature of that run of games being sure to take a toll in the legs of a hard-running outfit at some point, and that aforementioned trip to Yorkshire starts off a more favourable run of fixtures the far side of the upcoming worldwide break. "Maybe we didn't help him like a team and help him to score more goals".
"Up and down they are the best team in the world in these transitions, offensive, defensive, they are built for that".
However, City have performed better in their eight games this season than they did in the equivalent fixtures in 2017-18, Gracenote's analysis suggests.
"They are built for that, Jurgen (Klopp) is built for that".More news: Former UC Berkeley professor awarded Nobel Prize in economics
"At the end we need to be happy - I need to be happy - that we didn't lose it because of the penalty".
It has everything to do with the cultures both men have created at their clubs; as well as the differing levels of difficulty provided by their respective opponents.
Blues boss Maurizio Sarri has talked about there being a gap between his team and City and Liverpool, but they can close it if they can keep Hazard fit and in the kind of form he is in at the moment. "But now it is over so I can", said Klopp.
"It was really intense".
Yet he was typically tough on himself after gifting the late penalty by diving in on substitute Leroy Sane, with the towering centre half insisting it is lesson he must learn swiftly.
United have plenty of time to make up the ground they have lost on the leaders, but there is a reason they are already off the pace and, like the Gunners, I think their main aim now will just be to finish fourth. We know this club how complicated it is playing in this stadium and how risky they are.
The Reds have kicked off the season with a bang.