The game was ultimately decided by a late own goal after Klopp made 11 changes at half-time, but much of the focus was on an impressive showing from Keita once again.
It has been a bitter time for the No. 8 since joining Liverpool from RB Leipzig, with Keita clearly a hugely talented player but one who is unable to string together a consistent run of games due to injury.
Often he has stood out in pre-season only to have his momentum halted when the campaign gets underway, and fans are hoping this is not the case again in 2021/22.
I pray Naby Keita stays fit this season, such an unbelievable player would 100% start for us if he didn’t have horrible luck.
— Samuel (@SamueILFC) July 23, 2021
Hate watching Keita play because when he’s not crippled he’s such a baller ?
— sabah (@Sabah07) July 23, 2021
Sometimes, I would rather that Keita wasn't this good because I feel robbed by missing out on seeing him play often. It's been said enough times, but, man, if he could stay fit…
— John O'Sullivan (@NotoriousJOS) July 23, 2021
Keita is probably in the first XI in terms of ability. We've always known that. The problem is we can't get him on the pitch. If that changes then it's a game changer. But I wouldn't count on it.
— Levene (@CalvLyfeson) July 23, 2021
Filthy from Keita
— ??? (@PassLikeThiago) July 23, 2021
Naby Keita the standout in that first half for me. Really hoping that it can be an injury free season for the Guinean and that he will be able to showcase the ability that we all know he is capable of on a regular basis this season.
— Jack Gill (@jacklfcgill) July 23, 2021
Keita is ridiculous omds why does this guy have to be made outta cheerios
— ? (@3Kashaveli) July 23, 2021
I hate how people question Keita’s ability, we’ve seen how good he is, the issue is the injuries, there’s a difference, stop acting like he’s ass
If he can stay fit he’s such a vital part of the team
— ? (@_Riddxck) July 23, 2021
Oh God, please make Naby Keita fully fit next season.
— Magical Mo (@MagicalMo_) July 23, 2021
Whisper it but Naby Keita looks sharp…… #LFCPreSeason
— Jamie Holme (@JamieHolme) July 23, 2021
Dare I say, Keita has looked like the player we thought we were getting…. pic.twitter.com/244swkXhod
— Kenny (@KopAce74) July 23, 2021
Naby Keïta vs Mainz, highlights and key passes pic.twitter.com/ekwN9Ckluk
— Josh (@KloppStyle) July 23, 2021
Time to get invested in Keita again over a preseason game pic.twitter.com/BEVbHowT9m
— Josh? (@_lfcjosh) July 23, 2021
It is a difficult situation for Keita, because when fit he would certainly be challenging for a first-choice spot in Klopp’s midfield, but the regularity of his injury problems makes him hugely unreliable.
The opportunity to get back up to speed with pre-season is vital this summer, particularly as Fabinho, Thiago and Jordan Henderson are all set to return late and could be doubts for the Premier League opener at Norwich.
With Gini Wijnaldum having left to join PSG, Klopp will be looking for another top-class midfielder to rely upon – and in an ideal world, that would be Keita.