No team in the world has as strong a roster as Liverpool at the moment. But with Arne Slot having promised movement in the transfer market in the summer, how exactly do you improve on what he already has?

Firstly, keeping key players Mohamed Salah, Virgil van Dijk and Trent Alexander-Arnold is a must. So too is moving on a few stars to create more room for others to come in. And as ruthless as it might be, there are two areas of the Liverpool starting XI that look most likely to be upgradeable — as long as the trio of contracts are tied up.

At left-back and number nine, Liverpool could bring in new additions to improve its starting XI more than in any other position. But that might mean starting to move on from a couple of fan favorites.

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In attack, Diogo Jota is inconsistent in terms of his availability and Darwin Nunez is yet to properly kick on. Slot outlined this week what he wants from his ideal number nine: excellent link-up play and plenty of goals and assists. For different reasons, no current option offers a blend of both.

At 28, if a substantial offer was to arrive for the Portugal striker Jota, Liverpool would have to consider it. When he is on the pitch, he is superb; too often, though, he is sidelined.

Jota has already missed 16 matches through injury this season and that explains why he has only scored eight times. He is scoring once every 122 minutes on the pitch — but there just aren't enough minutes to increase the volume. Nunez is frustrating in a different way, even though he put in his most impressive showing for some time against Spurs.

Andy Robertson, meanwhile, has been much improved in the last couple of matches. Against Bournemouth — almost like he was trying to prove a point against Milos Kerkez, one of the very best left-backs in the Premier League this season — he was very solid, and against Spurs, he put in a similar showing.

The argument for bringing in another option on that side of the Liverpool defense is not so much about Robertson's drop-off — even if there is no doubt that across the campaign as a whole he has not been at his peak levels — but more about making sure when he does play, he can put in a level of performance that fits his quality.

At times, Robertson has looked a little jaded this season. Some of his decision-making has not been particularly sharp, and there have been errors, in part caused by him lacking the pace he once had.

His experience, as a key member of the leadership group, is vital. Liverpool will see a better version of Robertson, though, if there is a younger player there to play more of the minutes — whether that is Kerkez or someone else.

Slot said last week that work was going on behind the scenes ahead of the summer. "I do know we're definitely working on strengthening," he told the BBC.

Difficult decisions lies ahead, but finding upgrades at full-back and down the middle of the Liverpool attack is the simplest way of ensuring an improvement next season no matter how Slot's debut campaign ends.