I'm sure programmers can work it out, anyway I think it's not a big problem since you can check the calendar, in order to check when games will be played and plan when you can train or need to rest due to multiple match days.

Related to this, another improvement can be to be allowed to receive up to 5 for each boost each day. I mean, since I have 40 or more friends it makes no sense to receive 10 rest boosts from 10 friends and get only one...getting up to 5 each day could be much more useful!