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Spirou have been far from consistent this season, especially at the start, but they got more consistent later on, and started following the coach Fulvio Bastianini's instructions. He even quit at one point because the players lacked approach and eagerness. Now they're defense oriented. Their average in the Belgian championship is 163.2 points, a bit under 159 at home, but most Belgian teams play very fast basketball, so those matches cannot really be compared to the one against Mons, their regional rival. Looking at Spirou's home matches that are relevant for this one, there's the one against Oostende whom they beat 74-69, and maybe the one against Brussels that ended at 154 points. They stayed under this margin against the super fast Limburg (154), and Willebroek (140) (144 on the road against Oostende when they fell apart, and Spirou were 17 points down in the first half).
Mons are the most defensively oriented team in the league. They sometimes get to the high numbers against run and gun teams like Limburg, Okapi and Willebroek, but that only happened four times in 17 league matches. Mons average under 149 points, and under 148 in the last ten rounds. They played Oostende four times this season, 145 and 130 points in the championship, and 134 and 133 against Brussels. They stayed under this margin in two cup quarterfinal matches against Oostende, when Mons couldn't match them the right way, but it's hard to expect them to fall apart against Spirou tonight.
The first duel between these two ended at 134 points, in their last ten championship and cup duels, they went over this margin only once. In those championship matches they played this season that are relevant, Spirou went over only against Brussels. It should be noted, though, that Spirou played much faster at the beginning of the season, and they were weaker defensively compared to now.