Arsenal had been expected to bring in January reinforcements, but Mikel Arteta is now unsure if that will be possible.
Leeds' slump went on but Brentford were unable to take full advantage, while Rhian Brewster helped Swansea to victory in the Championship.
A shock loss against Sheffield Wednesday saw Leeds United surrender top spot in the Championship to West Brom.
Mikel Arteta was happy Arsenal responded to a poor first-half performance against Leeds United, having got angry with his players.
Reiss Nelson scored the only goal as Arsenal saw off Leeds United to reach the fourth round of the FA Cup.
Pierre-Emerick Aubameyang has moved to clarify his future amid reports that he admits are getting irritating.
Barcelona, Real Madrid and Inter are reportedly keen on Pierre-Emerick Aubameyang with Mikel Arteta to leave the Arsenal captaincy with him.
Mikel Arteta was not appointed as Arsenal's new coach just because he worked under Pep Guardiola, according to Marcelo Bielsa.
Championship leaders Leeds United could beat Ole Gunnar Solskjaer's Manchester United, according to Whites wing-back Ezgjan Alioski.
Mikel Arteta said "it's not looking good" for Calum Chambers, who had to have surgery on a knee injury on Thursday.