Arsenal are interested in England prospect Abdul Abdulmalik.
The Daily Mail says Abdulmalik is training with Portsmouth but has been left in limbo by Millwall's stance over his future.
Teenage England under-17 forward Abdulmalik's contract expired this week but he remains unable to join a new club with Millwall digging their heels in and so far refusing to negotiate with interested parties.
They have rejected a number of approaches from Swansea for Abdulmalik, who has also been watched by Arsenal and Rangers.
Swansea's highest offer was a structured package worth around £200,000 with further add-ons.
Millwall have attempted to persuade Abdulmalik to stay by offering him a new deal, but their proposal is considered derisory and not reflective of club claims that the 18 year-old has a big future at The Den.