Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
Unlike in other nations such as England, reserve teams in Spain play in the same football pyramid as their senior team rather than a separate league. However, reserve teams cannot play in the same division as their senior team. Therefore, the team is ineligible for promotion to the division in which the main side plays. Also, if the main team is relegated to the division in which its reserve side played in the prior season (which happened in 2011–12), the reserve team is automatically relegated to the division below the main team. Reserve teams are also no longer permitted to enter the Copa del Rey.
Premier League International Cup
Villarreal successfully applied to compete in the 2014–15, 2015–16 and 2016–17 versions of the England-based Premier League International Cup. They won the tournament in 2016, beating PSV in the final. Most of Villarreal's players in this Under-23 tournament have been drawn from the B side with some additions from C Team and the Juvenil group.
Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply. Players may hold more than one non-FIFA nationality.
Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply. Players may hold more than one non-FIFA nationality.
No.
Pos.
Nation
Player
Out on loan
Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply. Players may hold more than one non-FIFA nationality.
Miguel Álvarez
Igor Taševski 
Mariano Barbosa
