No overnight effects to be seen.
Alas, averages are reset when tier changes which was on July 26th. Your first Pro round of 39 (x2) set it to 78, five rounds following between 43 (86) and 51 (102) caused a rise to 91.67 (= +13.6) through three days. Now it's dropping again.
When you reach saturation at 20 rounds, the high scores will become eliminated one by one and your average will only drop.
Hit it str8 m8!
A tip unrelated to average and tiers:
Playing every day and playing tournaments instead of standalone rounds will bring a max. of XPs to you, supporting your ride through the levels.