“I like it that you are mentioning that he played a good game [at Chelsea] because I completely agree on that,” Slot told his pre-Arsenal press conference on Friday morning.
“He played a really good game. I think maybe the last step he has to make – and he already made that – but then on a consistent level is to not be involved in that moment what happened in the last minute [giving away a penalty].
“He has all the qualities and he is already shown that to me – but also to you – to play for this club. But the biggest part of us winning the league is of course consistency and that is the most difficult part for a younger player to get that as well. Some, like Lamine Yamal, it’s not a really big problem for him to find consistency.
“But Jarell, I think he developed really well throughout the whole season and the next step is for him to not be involved in a moment like this in the last minutes, which had no impact on the result. It would’ve been nice for him if it wouldn’t have happened because then probably everyone would’ve been much more positive about his performance.
“Jarell is fast, strong and comfortable on the ball. He has every ingredient a centre-back for this club should have. Now the last parts should be consistency in his performances.”
On Quansah facing competition for places and fighting for minutes, he added: “That’s why it’s so hard to play for Liverpool for everyone, not only for a player that comes from the Academy, but also the players we bring in.
“To play in this team you need to be really, really, really good and he is competitive to the other ones. But he was maybe a bit unlucky that the other ones stayed fit throughout the whole season and they have so much consistency in their levels.
“Jarell has had consistency as well but one moment can change the perception of a game. One moment can also lead to us losing or winning a game of football. One moment he had the ball at the post against Paris Saint-Germain I think 10 minutes before the end.
“These small details can make a big difference in a season. That’s why to play at Liverpool and to play at Arsenal and to play at Paris Saint-Germain you need to do so many things well at the highest level – but the moment you do so he can play here for so many years to come.”