Tom Soares of AFC Wimbledon and Ricky Holmes of Charlton Athletic in action during The Emirates FA Cup Second Round.
Sheffield United have been busy in the January transfer window so far, with Ricky Holmes becoming the latest of their four new signings this month along with Ryan Leonard, Lee Evans and James Wilson.
Yet the return of Cameron Carter-Vickers to Tottenham Hotspur following the end of his loan spell leaves the Blades a player down in central defence.
Conor Washington of Queens Park Rangers takes on Cameron Carter-Vickers of Sheffield United during the Sky Bet Championship match at Loftus Road.
With manager Chris Wilder generally preferring a 3-4-1-2 formation it is a position where plenty of options are needed and therefore the 50-year-old could delve into the market once more to sign a centre-back.
If so, then perhaps Wilder will finally land a defender that he has been tracking for some time in Brentford's John Egan; who was the subject of a rejected £2m bid from the South Yorkshire side on deadline day back in August - reports Sky Sports.
Chris Wilder, manager of Sheffield United, looks on during the Sky Bet Championship match against Sheffield Wednesday.
Then on November 27 the Mirror (print edition, p48) claimed that United were considering an offer of £750,000 for Egan in January; which has failed to materialise as yet.
The 25-year-old previously spent time on loan at Bramall Lane in 2012 when with Sunderland and joined the Bees from Gillingham in the summer of 2016, playing 55 games and scoring seven goals in all competitions since.
John Egan of Brentford wears the Stonewall Rainbow Laces Campaign captains armband during the Sky Bet Championship match against Queens Park Rangers.