Arsenal boss Mikel Arteta added several youngsters to first team training for Monday's return.
Jeorge Bird's Arsenal youth website reports midfielders Myles Lewis-Skelly and Matt Smith were both included for the session. Goalkeepers Hubert Graczyk and James Hillson were also involved.
With regards to first-team players, Rob Holding, Oleksandr Zinchenko, Albert Lokonga, Eddie Nketiah, Cedric, Reiss Nelson, Gabriel and Marquinhos were amongst those involved in the session.
Arsenal are to play Watford in a behind closed doors friendly this week before heading to Dubai, where they will take on Lyon and AC Milan in the local Super Cup competition.
Upon returning to London, Arsenal will play Juventus in a friendly at Emirates Stadium.