Probably the smallest man on the filed, a child compared to giants like Gomez and Pogrebnyak, William Collum was visibly nervous at the start of the match. But only at the start.
There was a fight, sort of, and Collum yelled at the players, gesturing wildly, whistling as loud as he could. But after 30 minutes or so, the match became easier for the Scottish ref. Only a few fouls, 2 clear bookable ones and one not so. The fact that the players behaved themselves, could be Collum's doing.
Average players in both teams, but Zenit are much better as a team..