It is an opportunity for teams to test less experienced players and for them to gain valuable ice time at an international level.

"We've continued to test players on our reasonable-cause list," he said.

In the days leading up to the final, both teams made use of mid-week games to test players who were doubtful due to injury.

In the past, the league tested players only for cocaine and heroin.

The Arena can be used to test characters against one another and, if online, other players.

We test players on all teams each week of the season, conducting more than 8,000 tests a year for steroids and related substances.

Another notable moment in this season was a challenge that tested players' endurance against temptation.

However, clubs may test players at other times with "reasonable cause."

This is clearly the only way to test players, where data would be able to withstand scientific and therefore legal scrutiny.

"We would know more if we could test players for longer periods of time, but that isn't practical or ethical," he said.