yes game shape resets on monday and all players will have respectable Game shape until the first league game next season , so you don't need to count minutes about game shape...
now there is another trick on how to lose the saturday's game , simply put only 3 players on the match. Game starts with 4 or 3 players (careful , game doesn't starts with 2!!!). But I am telling you all those without knowing how good your team is or your opponent's team is , also without know your training minutes and etc...all these are things you need to think for yourself :)