Marcelo Bielsa feels his side is strong enough to maintain their Premier League promotion charge, however look set to face competition from an emerging pack - including the likes of Nottingham Forest and Fulham. Scroll down and click through the pages to see EVERY deal done in the second-tier this month ahead of Friday's deadline.
1. Barnsley
IN: Kilian Ludewig (RB Salzburg, loan), Michael Sollbauer (Wolfsberger AC) | OUT: Cameron McGeehan (Portsmouth, loan), Jordan Green (Newport, loan), Mallik Wilks (Hull, loan), Toby Sibbick (Hearts, loan), Victor Adeboyejo (Cambridge, loan) | Getty
2. Birmingham City
IN: Scott Hogan (Aston Villa, loan) | OUT: Steve Seddon (Portsmouth, loan), Agus Medina (UE Cornella, loan), David Stockdale (Wycombe, loan), Fran Villalba (Almeria, loan) | Getty
5. Bristol City
IN: | OUT: Tyreeq Bakinson (Plymouth, loan), Hakeeb Adelakun (Rotherham, loan), Sammie Szmodics (Peterborough, loan), Bailey Wright (Sunderland, loan) | Getty
6. Cardiff City
IN: | OUT: Ciaron Brown (Livingston, loan), Gary Madine (Blackpool), Bobby Decordova-Reid (Fulham), Joe Day (AFC Wimbledon, loan) | Getty