While the Blues have yet to add to their ranks so far in this window, the same can’t be said for some of those with promotion pack, with the likes of Hull, Sunderland and Fleetwood all dipping into the transfer market to boost their ambitions.
Hull have, however, seen two players also depart.
But their losses won’t be felt as hard as one endured at Doncaster Rovers.
The promotion-pushers saw highly-rated captain Ben Whiteman depart for Preston on Thursday, which will represents a huge blow to their Championship hopes.
A sizeable but undisclosed fee was obtained for the midfielder’s services, though, which means Donny boss Darren Moore will be keen to reinvest the money very soon.
Here's a look at what business was carried out by League One clubs over the past seven days...
1. L1 Transfers.jpg
From left: Gavin Whyte, Kyle Vassell and Ben Whiteman
2. Carl Winchester: Forest Green Rovers to Sunderland
The Northern Ireland international midfielder has signed a two-and-a-half year deal at the Stadium of Light. Aged 27, he joins the Black Cats for an undisclosed fee having previously worked with manager Lee Johnson at Oldham. Picture: Harry Trump/Getty Images.
Photo: Harry Trump
3. Sam Walker: Reading to AFC Wimbledon
The Royals keeper, 29, has joined the Dons on loan until the end of the season. He played twice for Blackpool this season on an emergency loan and has 268 league games under his belt. Picture: Stu Forster/Getty Images
Photo: Stu Forster
4. Tendayi Darikwa: Nottingham Forest to Wigan
The Zimbabwe international defender, 29, has joined the Latics on a free transfer. He has not played for Forest since March 2019 and missed the whole of last season after rupturing his anterior cruciate ligament. Picture: Gareth Copley/Getty Images
Photo: Gareth Copley