Arsenal are in dire need of reinforcements after a poor season that saw them finish fifth in the Premier League.
It means another year in the Europa League for the Gunners and Emery has been tasked with getting them back to the Champions League.
To do that, the Spaniard has demanded at least four signings – a centre-back, a left-back, a wide forward and a replacement for Aaron Ramsey.
There are deals in place and being worked on for the likes of William Saliba, Dani Ceballos, Kieran Tierney and Wilfried Zaha.
So it has come as a mighty blow after Laurent Koscielny revealed he wanted out of the club earlier this month.
The Frenchman wants to be released a year early from his contract and refused to travel with the squad on their pre-season tour of the United States.
A number of Ligue 1 clubs have registered an interest, including Rennes and Bordeaux.
But Emery is not happy with the manner of his captain’s behaviour and has frozen him out of the first-team until he is sold.
“I tried for him to be with us in the pre-season here and to continue working to find a solution between the club, between him and between us,” Emery said.
“When he decided not to stay with us here in the tour, the solution now is only for the club and him because he decided to be out of the team in pre-season.
“I respect him, but we have responsibility, he has his responsibility and the club has their responsibility and I have my responsibility.
“And now it is one issue only for the club and for him. My idea is continuing with the players we are working with and the players that want to be here.”
Arsenal have had a mixed pre-season tour of the United States, beating Bayern Munich but losing to Real Madrid on penalties last night.
The Gunners had been 2-0 up but two goals from Gareth Bale and Marco Asensio saw the Spanish giants draw level.
Misses from Arsenal’s Granit Xhaka, Nacho Monreal and Robbie Burton saw Real run out winners in an entertaining game.
Arsenal have now travelled back to the UK where Emery will continue coaching duties with his first team squad – without Koscielny.