2 Teams / 1 Training Group in App Inbox

We used the App to great success at U7 last year. This year at U8 we have grown and will be entering 2 Teams into the league, and intend to use the App again for this. However both teams will train together as 1 team. How can we administer training as an age group in the same place in the App (i.e. rather than just seeing separately who is training for Team 1 & Team 2) and maintain the 2 separate teams for Matchday within the App please?