Negotiations will go down to the wire, as clubs seek the best possible transfer deals. Here's a look at some of the high profile deals - some likely, some less so - that could happen before the transfer window closes.
1. Yannick Carrasco - Dalian Yifang
Crystal Palace know Wilfried Zaha will be on the move sooner or later, and Carrasco looks to be their first choice for a high quality replacement. They'll be looking to get this deal over the line today.(Photo credit: GIUSEPPE CACACE/AFP via Getty Images) Photo: GIUSEPPE CACACE
2. Matheus Cunha - RB Leipzig
Brighton & Hove Albion look set to battle it out with Wolves for the Bundesliga ace, who has netted an impressive eight goals in nine matches for the Brazil U23s. (Photo by JUAN BARRETO/AFP via Getty Images) Photo: JUAN BARRETO
3. Philippe Coutinho - Barcelona
Barca are set for a busy deadline day, and are said to be ready to cut his loan deal at Bayern Munich short to slash their wage bill. A return to the Premier League just might be on the cards. (Photo by RONNY HARTMANN/AFP via Getty Images) Photo: RONNY HARTMANN
4. Panagiotis Retsos - Bayer Leverkusen
Sheffield United smashed their transfer record yesterday with a £22m move for midfield colossus Sander Berge, and they could yet pull off another coup, with Greece defender Retsos close to joining too. (Photo credit: INA FASSBENDER/AFP via Getty Images) Photo: INA FASSBENDER