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The European Rugby Champions Cup is an annual rugby union tournament organised by European Professional Club Rugby (EPCR).

It is the top-tier competition for clubs whose countries' national teams compete in the Six Nations Championship.

Clubs qualify for the Champions Cup via their final positions in their respective national/regional leagues (Premiership, Top 14, and Pro12); those who do not qualify are instead eligible to compete in the second-tier Challenge Cup.

The RFU Championship, known for sponsorship reasons as the Greene King IPA Championship from 2013–14, is the second tier of the English rugby union league system and was founded in September 1987.

The league was previously known as National Division One and in 2009 changed from a league consisting of semi-professional clubs to one that is now fully professional.

The current champions are Bristol, who won promotion to the English Premiership after beating the Doncaster Knights in a two-legged play-off, having finished first in the league during the regular season.

Super Rugby (rendered in the current competition logo as "SupeRugby") is the preeminent professional men's rugby union football competition in the Southern Hemisphere and Japan.

Building off various Southern Hemisphere competitions dating back to the South Pacific Championship in 1986, with teams from a number of southern nations, Super Rugby officially started with the 1996 season with 12 teams from Australia, New Zealand and South Africa.

The competition was known as Super 12 through to the end of the 2005 season; the name was changed to Super 14 with the addition of two teams for the 2006 season; with expansion to 15 teams in the three countries for the 2011 season, the competition was rebranded as Super Rugby (no number included).

By 2006, matches were being broadcast in 41 countries.

The Top 14 is a rugby union club competition that is played in France created in 1892.

The Top 14 is at the top of the national league system operated by the French National Rugby League, also known by its French initialism of LNR.

There is promotion and relegation between the Top 14 and the next level down, the Rugby Pro D2.

The fourteen best rugby teams in France participate in the competition, hence the name Top 14.

The competition was previously known as the Top 16.

Premiership Rugby (also known as the Aviva Premiership due to sponsorship reasons) is an English professional rugby union competition.

The Premiership consists of twelve clubs, and is the top division of the English rugby union system.

Premiership clubs qualify for Europe's two main club competitions, the European Rugby Champions Cup and the European Rugby Challenge Cup.

The team finishing at the bottom of the Premiership each season is relegated to the second-division RFU Championship, and the winner of the Championship is promoted to the Premiership.