Sunderland's 1-0 defeat to Liverpool on Saturday has once again plunged Gus Poyet's men into the relegation dogfight.
Whilst the stat of just one shot on target in the 90 minutes against the Reds is concerning, but it seems that Poyet is more concerned about his defence.
The Black Cats have improved defensively since their 8-0 thrashing at the hands of Southampton in October, but the ageing duo of Wes Brown and John O'Shea could certainly be upgraded upon.
Lees, 24, came up through the Leeds United academy, and after impressing on loan with Accrington and Bury, he was handed a chance in the Whites' first team.
With 135 appearances in three seasons, Lees became a regular in the Leeds defence, but was allowed to leave the club in the summer, signing for Championship rivals Sheffield Wednesday on a free transfer in August.
Leeds may now be kicking themselves that they let him leave for free, with the player now deemed to be worth £3m having impressed with Sheffield Wednesday.
The Mirror suggest that the Owls don't want to lose Lees, but a huge bid from Sunderland could tempt them into a sale this month.