The Clarets have taken a 23-man squad to Poland for a first overseas training camp at Under-23 level.
The party – led by head coach Steve Stone – touched down in Berlin on Sunday night before transferring to their base at a hotel and sports complex at Opalenica, near Poznan.
Training started on Monday morning, with a week-long schedule planned ahead of a warm-up game against Pogo Szczecin on Saturday.
The Clarets are without midfielder Josh Benson and full-back Ali Koiki, who have travelled with the senior squad to Portugal, while goalkeeper George McMahon is on international duty with the Republic of Ireland at the U19 European Championship finals in Armenia.