Still, a number of loan deals, free transfers and low-cost moves have gone through this month, with the necessity to strengthen squads all the great in an injury-hit 2020/21 campaign. Here's a look at 17 deals, including Middlesbrough, that could still go through before Monday's transfer deadline:
5. Alex Pritchard - Huddersfield Town to QPR
QPR have already made three loan signings this month, and could yet launch a move for Pritchard. He's expected not to sign a new deal with the Terriers, and could be sold this month to avoid him leaving for nothing in the summer. Photo: James Chance
6. Zak Jules - Walsall to Birmingham City/Cardiff
The 23-year-old has been linked with a host of Championship sides so far this month. Birmingham City and Cardiff are thought to be among the front-runners, while League One outfit Portsmouth aren't believed to be interested. Photo: Charlotte Tattersall
7. Tom Ince - Stoke City to ?
Schake, Wolfsburg, Lille...and about ten other sides have all been linked with the Potters outcast. He's lost his way with Stoke, and will be eager to get back to his best with a move away this month. Photo: Nathan Stirk
8. Declan Gallagher - Motherwell to Cardiff City
The towering defender is hot property at the moment, attracting interest from the Old Firm sides as well as those in the Championship. It looks like he's staying where he is for the time being, unless a huge bid were to be lodged. Photo: Ian MacNicol