What do you mean Celtics showed too many times in this round? If that's the thing here then the series won't go into a 3-3.
Both of these teams played well and I'm sure you as a sports tipster for a long should understand that it's hard to predict who will win. The only basis for most bettors is betting on their own preferences maybe as a fan or being one-sided or popularity-based.
I'm an NBA enthusiast for over 2 decades now but can't give my wild prediction regarding this match. That's how tough to predict their series.