any one in this forum plays with best 11 but it depends on the match and remaining are used for Subs. For example if you have 2 matches with 1 hour difference, then you have to march the best 11 to the important match and you can keep some important players from the other 11 as subs for that match so that you can replace if there is any injury or not performing well.

you can use the same team for the next match or you can replace them...