FIFA have provided ball in play data for the 2014 and 2015 World Cups.
Today is the start of round 2 of the group games for #WWC2015.
I thought I would compare ball in play comparisons for both World Cup tournaments. I have selected the first 12 games in both tournaments.
In 2014 the profile of ball in play was:
In 2015, the profile is:
The comparison profile of both tournaments after 12 games is: