Millwall want to sign Jayson Molumby on loan for another campaign.
But the Ireland Under-21 skipper will return to Brighton for pre-season.
Molumby, 20, recently signed a new deal with the Premier League side until 2023 but turned heads during an impressive Championship spell with Millwall.
And Lions boss Gary Rowett said: “Jayson has had a tremendous loan. He’s got huge potential.
“We’ve helped him and he’s helped himself. He’s starting to play with a bit more composure and control to go with his natural energy.
“I think the plan from Brighton’s end is that he goes back there and spends pre-season with them to see where he is at.
“He’s one we tried to push a little bit a few months ago but the general consensus from Brighton is that he would go back.
“Should Jayson be available I’m sure he’d be a player we’d be very interested in. But I’m sure a lot of other clubs would be too.”