One observation of the African Cup of Nations action so far is that referees, by and large, have erred on the side of leniency.
A number of reckless tackles have not been punished with cards - although Ivory Coast's win over Ghana saw Emmanuel Eboue sent off.
The Arsenal ace's red card was not in keeping with what we've been seeing in Angola.
When the games start becoming decisive for teams, there is a possibility we could indulge in some tactical in-play betting.
One thing the referees are clamping down on is timewasting.
With the likelihood of one team hanging on to progress as we move into the knockout stages, it's quite possible there will be a few late cards getting dished out.
There is also the prospect that some nations will go down fighting - literally - as elimination creeps closer so the frustration levels rise accordingly.
So we'll be keeping a close eye on those spread markets during the games between closely-matched teams.
Not buying bookings from the outset but taking a decision on whether to jump in at some point in the last 20 minutes,
At times, it may be worth waiting later and even looking at stealing some value in the dying minutes - especially if a lot of injury time is expected.
It's a tactic that could pay off as the competition hots up.
