David Luiz is set to make one of the strangest moves of this transfer window.

The Brazilian defender is set to move across London from Chelsea to Arsenal.

Rumours circulated that he had trained away from the Chelsea squad on Wednesday as he looked to force through a move.

And, according to David Ornstein, the two clubs have now agreed an £8m fee for the player.

He wrote: "Arsenal have reached an agreement with Chelsea to sign centre-back David Luiz for £8m.

"32yo Brazil international will sign a 2yr contract. Deal for Celtic left-back Kieran Tierney 5yrs, fee £25m. Medicals today ahead of putting pen to paper before 5pm deadline."

So it seems it's going to be a busy day for the Gunners, with Tierney expected to sign as well.

Luiz is expected to be a first choice for Arsenal in the coming season alongside Sokratis Papastathopoulos.

The Gunners also have Rob Holding, Konstantinos Mavropanos, Calum Chambers and Shkodran Mustafi as defensive options.

The deal is even stranger given the fact Luiz signed a two-year contract extension with Chelsea in May.

The Brazilian defender then spoke of his love for Chelsea after committing his future.

“I am so happy to be here and to have this opportunity to stay. I love this club and I still have the ambition of a young player," he said, per talkSPORT.

“It means a lot to reach another European final, and we still have the opportunity to finish in the top three of the Premier League this season and I will continue to try to do my best to help the team.”

But just two three months later, he decided to leave for one of the club's closest rivals.

Clearly, a lot can change in such a small amount of time.

Luiz ends his Chelsea career having played 248 times across two spells.

He won six major trophies with the Blues, including the Champions League in 2012 and the Premier League in 2017.