event. Previous Winners US Open (2007–08) The US Open was a tournament introduced in 2007 to replace the World Series of Darts. The World Series ran for just one year in 2006. Phil Taylor won the US Open in 2007 and 2008. The tournament was reduced down to Players Championship status for the 2009 and 2010 editions. Previous Winners Championship League Darts (2008–13) Started in 2008, the Championship League Darts offered the players outside the top 8 in the PDC Order of Merit to compete for the championship. It was also the first tournament to be broadcast only by the internet.This tournament was discontinued after the 2013 edition. Previous Winners (2008–13) Champions League of Darts (2016–19) A new event staged for the first time at the Motorpoint Arena Cardiff in Cardiff on 24–25 September 2016 featured the top 8 players in the PDC Order of Merit. It was the first ever PDC event to be shown live on the BBC. Previous Winners (2016–19) Other tournaments and contests Champion versus Champion There have been two head-to-head matches bringing both respective world champions together in non-affiliated contests. Billed as the Match of the Century, Phil Taylor beat Raymond van Barneveld 21–10 at Wembley Conference Centre on 7 November 1999, to be unofficially crowned the first ever undisputed World Champion since the 1993 split in darts. In a further head-to-head on 21 November 2004 at the Circus Tavern, via the first ever darts pay-per-view on Sky Box Office, Phil Taylor again prevailed after his opponent Andy Fordham had to retire during the match due to dehydration. The immense heat took its toll on the 30-stone (420 lbs/191 kg) Fordham. Phil Taylor was leading the match 5–2 in sets before it was unexpectedly abandoned. Masters of Darts This event was staged twice in 2005 and 2007. In the 2005 Masters of Darts event four top players from both darts circuits together for the first major tournament confrontation since the two organisations separated. The players were split into two groups, sharing it with only members of their affiliated organisation. Each player then vied against all players from the opposition, with one point awarded for winning a match. Following conclusion of the format, the winner of each respective group played the runner-up at the semi-final stage. The Professional Darts Corporation pool consisted of Colin Lloyd, Wayne Mardle, Roland Scholten and Phil Taylor; whilst for the British