Frenkie de Jong, Neto and Antoine Griezman were the new faces at Barcelona's first preseason training session on Monday.
The South Americans who took part in the Copa America are yet to rejoin the squad -- Lionel Messi, Luis Suárez, Philippe Coutinho, Arthur and Arturo Vidal -- but everyone else is now back working under Ernesto Valverde.
The new faces were the main attraction at the morning session on Monday, with a second workout planned for the evening.
Griezmann's arrival stood out the most. He walked out on to the training pitch with his compatriots Samuel Umtiti and Ousmane Dembele after being presented on Sunday at Camp Nou.
Barça will train this week before heading to Japan for the Rakuten Cup next week, with games against Chelsea and Vissel Kobe planned.