José León made his debut
He replaced Javi Sánchez on 77' and helped the team beat Juventus.
The five academy players took part in the first stage of pre-season training under the watchful eye of Lopetegui.
The academy side have been placed in Group I Segunda B and will debut at home against Las Palmas Atlético on the 25th or 26th of August.
The Whites' youth side, led by Daniel Poyatos, have begun their preparations for the 2018-2019 campaign.
With Santiago Solari at the helm, the reserves completed their first training session of pre-season at Real Madrid City.