An injury to Fabinho overshadowed Liverpool's unconvincing 2-0 Champions League win over Midtjylland, with Diogo Jota and Mo Salah on target
Jota fired into an empty net from the Reds' best move of the game - to score the club's 10,000th goal in history - 10 minutes after half-time when man-of-the-match Trent Alexander-Arnold teed up the Portuguese forward for a tap-in
That would prove to be their only shot on target until injury-time, but Liverpool had already been made to sweat before half-time when , leaving Rhys Williams the only senior defender able to replace him with half an hour played
Jurgen Klopp had left Roberto Firmino, Salah and Sadio Mane on the bench but even the introduction of the latter pair with an hour played made little improvement to their attacking play
Liverpool were nearly made to pay when substitute Evander fired just wide before Anders Dreyer went even closer late on, but the hosts added some gloss to a poor performance when Salah converted a penalty he had won himself in injury-time to keep up their perfect start to their Group D campaign
Midtjylland came into Tuesday's game having been hammered 4-0 by Atalanta in their first-ever Champions League group match a week ago, but Klopp insisted the Danish champions would give his side a run for their money - and he was not mistaken
Star-man Dreyer came close to proving his point with less than three minutes on the clock when he brought down Alexander Scholz's long ball and pulled a strong low save out of Alisson
Liverpool's changed front three looked uncomfortable as a trio and it was Alexander-Arnold who looked most likely to create an opening, with Takumi Minamino missing a low cross altogether before Joel Andersson stopped another from reaching him after a good run from the Liverpool right-back
But a match-ending injury to stand-in defender Fabinho on the half-hour mark would prove a bigger concern for the Reds, with Williams, who a year ago this week was starting in defence for Kidderminster in the National League North, his only available replacement
Perhaps more cautious to protect the inexperienced defender, Liverpool looked more solid in the last throes of the opening period, and saw Jota and Minamino nod Alexander-Arnold crosses wide before going in goalless at the break
Georginio Wijnaldum replaced Jordan Henderson as Liverpool's second change at the interval before they upped their level of intensity from the restart, and 10 minutes after half-time finally looked like the Liverpool which Klopp has developed in recent years to open the scoring
It was little surprise Alexander-Arnold was at the heart of the move, timing his run from a one-two with Xherdan Shaqiri to perfection to stay onside before squaring for a simple Jota finish
Mane and Salah were introduced five minutes later but their introduction, likely sooner than Klopp would have liked, did not have the desired effect as Midtjylland grew back into the game after the setback of the goal
With 13 minutes remaining, substitute Evander fired wide after shaking off Joe Gomez before the defender was again sluggish as Dreyer drifted past him and fired a glorious chance to level into the side-netting
Paulinho's clumsy foul on Salah from a long ball in injury-time gave Liverpool the chance to add a second goal they could barely claim they deserved in the final minute, with the Egyptian getting up to bury the spot-kick beyond Mikkel Anderson and ensure the Reds stay top of their group
Liverpool boss  told : "[Fabinho's injury] is exactly the last thing we needed
 What can I say? I know he felt his hamstring, that's not good, he didn't feel it that much, he said he could have played on but with no sprints any more so that doesn't help in that position obviously
 We'll see, we have to do a scan and then we'll know more, but that's not good, of course
"The problem then is the challenges in the moments when you have to be really lively without the ball as well, and then you have to calm down
 Tonight, in too many situations that did not happen for us
"It was a bing-bing, bing-bing game pretty much, with two goals we scored, three big chances for them, I would say
 We had a couple more where we could have scored, but it never became an easy one, it was a proper fight until the end
"Sometimes it can be difficult to pick a man of the match
 Not tonight
 Alexander-Arnold was head and shoulders above anyone else on the pitch, running the show from right-back and making both goals
He had no problems up against one of Midtjylland's dangermen Mabil, who was removed with 25 minutes to go, and was Liverpool's most creative outlet by a mile
Had Minamino and Jota had their shooting boots on more regularly, he could have had a quartet of assists, but he can rest easy after a superb double which played a major part in Liverpool's win
Next up, Liverpool host West Ham at Anfield in the Premier League on  live on  from 5pm; Kick-off at 5
30pm
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