This is a high total especially as the teams play more games inside their bubble and fatigue builds up.
The Sky are 12-5 to the Under when playing on one day's rest. 
Chicago is shooting a league-best 48.6 percent from the floor. The Sky are improved this season, but I doubt they can keep up that high of a percentage. 
Phoenix has clamped down defensively giving up an average of 70.5 points in its last two games.