​Arsenal look set to seal the deadline day transfer of David Luiz for £8m after the Gunners struck a deal with Chelsea to move the defender across London, while club scapegoat Shkodran Mustafi is being linked with a switch to Ligue 1.

Unai Emery has been on the hunt for reinforcements in the centre of defence, after watching his side ship 51 Premier League goals last campaign while club captain Laurent Koscielny sealed a move to Bordeaux this summer.

Having been ridiculed by ​Arsenal fans for much of his time in north London, it appears as if it will be one in and one out at the Emirates, with Sky Sports (via ​GFFN) claiming Mustafi is 'potentially' on his way to a Ligue 1 club on Thursday.

GFFN ​also mention a report from L'Equipe, which states the Gunners have failed in their efforts to sign Daniel Rugani and Dayot Upamecano, although the club's technical director Edu retains hope in securing some kind of deal for Samuel Umtiti of ​Barcelona, no matter how faint that may be.

Shkodran Mustafi

While no club has been mentioned by Sky in regards to Mustafi's exit, the most likely avenue for the German would be AS Monaco, who ​Football London linked with signing the central defender  recently.

With one centre half having already left the club and another rumoured to be following, that opened the door for Arsenal to swoop in for Luiz. The Brazilian was linked with Emery's side only yesterday but the move is now set for an imminent conclusion after the BBC's ​David Ornstein confirmed an agreement had been reached between the two parties for £8m - with Luiz to sign a two-year deal at the Emirates.

Fears over regular playing time at Stamford Bridge appeared to have swayed Luiz into leaving Frank Lampard's side, while Ornstein also adds that Kieran Tierney's move to Arsenal will be a £25m deal on a five-year contract. Both players are due to have their medicals on Thursday and will be completed ahead of the 5pm deadline.

With Luiz' arrival expected in the next few hours, news of Mustafi's looming exit may force Emery to dip into the market once more. The aforementioned Umtiti appears the only viable option at present, although it would require some fee to prize the World Cup winner away from the La Liga side.