Professional Referee Organization (PRO) general manager Peter Walton and 2016 MLS Referee of the Year Alan Kelly know thousands of armchair officials are inspecting their work closely every weekend. So what do they do to make sure they get the big calls right and let the players decide the result?

More than you probably know.

As the ETR Extravaganza continues, don't miss our referee special as Walton explains what his crews will focus on in 2017 and Kelly explains what it's like to be the man in the middle.