Leeds United's defence will be in a battle against Millwall striker Lee Gregory.
Sunderland, Sheffield Wednesday and Derby County are reportedly interested in Lee Gregory of Millwall in the summer transfer window.
Sunderland appear to be preparing for life in League One by targeting Shrewsbury Town's Jon Nolan and Millwall's Championship striker Lee Gregory.
Sunderland look set to be relegated from the Championship and already have a number of League One talents on their radar.
What impact would the striker's arrival at Derby County have on Sam Winnall's future, on loan from Sheffield Wednesday?
Championship trio Sheffield Wednesday, Derby County and Sunderland reportedly Millwall's Lee Gregory, but where are Leeds United?
Sunderland are amongst the host of Championship sides reportedly interested in signing Millwall striker Lee Gregory.
Championship duo Sheffield Wednesday and Derby County are just two of the sides keen on signing Millwall striker Lee Gregory.
Sunderland are bottom of the Championship and slipping towards League One - so signing Millwall striker Lee Gregory would make perfect sense.
The Millwall man is a reported transfer target for Sunderland and Sheffield Wednesday.