We can set sv_matches_per_map (default: 1) to increase the number of matches player per map (obviously).
But it will not work without maprotation. The current match number doesn't get displayed in the scoreboard, either.
I think it would be a nice addition to make this work without maprotation being set, too.
This could be useful for clanwars, playing f. e. best of 5 on only one map.