Manchester City could make a deadline-day transfer raid for Leicester forward Riyad Mahrez but look certain to have to stump up another club-record fee.
The Algeria international is understood to have been earmarked as a potential late target for the Premier League leaders after the blow of losing Leroy Sane to injury.
Reports on Tuesday claimed a £50m offer has gone in to Leicester but that the Foxes would have no interest in selling unless a huge sum is on the table.
The 26-year-old would give City manager Pep Guardiola another attacking option as he chases glory in four competitions.
Arsenal manager Arsene Wenger accepts getting a deal for Pierre-Emerick Aubameyang pushed through ahead of the transfer deadline was always likely to prove "complicated".
RTÉ Sport understands there is an agreement in principle between Arsenal and Borussia Dortmund for the Gabon forward, who was widely reported to have travelled to London on Tuesday to finalise a potential £60million switch.
However, there is the added issue of Dortmund first seeking assurances over a replacement - which could well be Michy Batshuayi from Chelsea, themselves looking to bring in Gunners forward Olivier Giroud.
Manchester City were extremely busy on Tuesday, signing defender Aymeric Laporte from Athletic Bilbao in a reported £57million deal before bringing in English midfielder Jack Harrison from sister club New York City.
Harrison joined City on a three-and-a-half-year deal before heading straight out on loan to Championship side Middlesbrough for the rest of the season.
Arsenal will miss out on Monaco midfielder Thomas Lemar. The Ligue 1 champions' vice-president Vadim Vasilyev has reiterated that the France international - also a reported target for Liverpool - is not for sale this month.
"He will stay at Monaco until the end of the season 100 per cent," Vasilyev told French radio station RMC. "If Liverpool or Arsenal come with a big offer before the end of the market? This is not relevant."
Meanwhile Pool boss Jurgen Klopp says striker Danny Ings will only leave Anfield on transfer deadline day "if I'm unconscious".
The German is anticipating a quiet day before the transfer window closes with a few departures. Lazar Markovic has to decide between a loan at Wolfsburg and Swansea while under-23 midfielder Ovie Ejaria is set for a temporary move to Sunderland.
He has reiterated, however, that Ings will not be leaving.
Southampton's attempts to sign forward Quincy Promes are being met by resistance from Spartak Moscow.
It looks set to be a busy deadline day for Championship clubs after several managers vowed to dip into the transfer market following Tuesday night's fixtures.
Sunderland boss Chris Coleman said Ovie Ejaria will be joining his side on loan from Liverpool as a replacement for Watford-bound Didier Ndong after their 3-1 defeat to Birmingham, while Nottingham Forest boss Aitor Karanka said he would be adding to his squad following the 3-0 home defeat against Preston.
Jordan Hugill was left out of Preston's matchday squad against Forest after boss Alex Neil decided he was not in the right frame of mind amid speculation linking him with a move to Crystal Palace.
Republic of Ireland international Andy Boyle has left Preston North End to join Doncaster Rovers on loan until the end of the season.
