Sheffield United are no exception, with ex-Everton and Sunderland man Jack Rodwell already joining this month. Here's a rundown of all the players who have been linked with a move to Bramall Lane so far this month...
1. Eberechi Eze - Queens Park Rangers
On paper, he's pretty much the archetypal Chris Wilder signing - youthful, versatile, and ready to step up to the next level. However, Spurs look to be the front-runners to seal a deal at the moment. (Photo by Alex Pantling/Getty Images) Photo: Alex Pantling
2. Billel Omrani - CFR Cluj
Sheffield United may well look to land another striker in January, with Lys Mousset the only Blades forward to really impress this season. Omrani has played Europa League football this season and scored 11 times for his side. (Photo by Marco Rosi/Getty Images) Photo: Marco Rosi
3. Adrien Tameze - OGC Nice
The central midfielder has also been linked with Aston Villa, Southampton and Burnley. He can also play as a defender, a quality which is likely to be of interest to the Blades.(Photo credit: PASCAL GUYOT/AFP via Getty Images) Photo: PASCAL GUYOT
4. Jordan Jones - Rangers
Strange one this, considering that United don't use wingers in their formation. Still, he's been tipped by some for a move to Bramall Lane, and could always be played as a wing-back. (Photo by Ian MacNicol/Getty Images) Photo: Ian MacNicol