There is potential for the bookings market to have a boost when the two ex-Yugoslavia states meet on Thursday. Both Slovenia and Serbia have lost their opening games so this clash has a "must win" feel about it. The referee, Istvan Kovacs of Romania, has given out 4 cards or more in each of his last 14 games in all competitions. His last 5 national matches have seen make ups of 70, 85, 30, 70, 80. The 30 was England's one-sided 7-0 hammering of North Macedonia.
The spreads are currently only 39-43, and you can get 21/20 on over 4 cards (Asian) where exactly 40 points returns your stake.