EX-Newcastle midfielder Conor Newton is on Millwall's summer shopping list.
Lions head of recruitment Mick Harford made a flying visit to Scotland last weekend to see the 22-year-old in action for loan club St Mirren.
Newton has recently negotiated a free transfer from St James' Park and held talks with Harford after he scored in a 1-1 draw with Hearts.
A source close to Newton said: "Ian Holloway wants young, hungry players to buy into his philosophy. He wants to build a team that can grow together.
"For that reason, Conor loves the idea of Millwall."
Wolves, Rotherham and Sheffield Wednesday are also interested.