The Mirror's Maddock has been discussing Liverpool's potential transfer business over the next year with fan-site LFC4Ar.
He has claimed Liverpool will be looking to make "a couple of big signings," one in the January transfer window and one next summer.
As well as potential signings, the journalist was asked about the possibility of any upcoming departures, as he revealed the likes of Lallana, Lovren and Shaqiri are all likely to move on in the summer.
"I think Lallana will move on in the summer as he's at the end of his contract. However, I think Klopp would like to keep Milner.
"He's so valuable in the dressing room and can play in so many positions. He is still a hugely valuable squad player.
"Shaqiri will leave next summer, should there be the right offer.
"Lovren also spoke to Roma last summer. He would have been allowed to leave for the right price, but it turns out Liverpool needed him all along, so it's a good job he didn't go.
"But it's something Liverpool will look at in the summer, that's for sure."
Lallana and Shaqiri both started the Reds' 5-2 win over Everton in midweek but have been sparingly used over the last year, mainly featuring from the off in domestic cup competitions.
Their departures should not have too much of an effect on the squad, although if they are to leave, Klopp will more than likely want to sign a replacement or allow youth to take their place.
Lovren, meanwhile, has filled in admirably during injury absences for Joel Matip and Joe Gomez in the last twelve months and there is no doubt Klopp will be looking for another centre-back if he does decide to depart Anfield at the end of this season.