Assuming that the two teams are eligible for every available competition, and including every scenario (such as cup replays, etc.), what would be the maximum number of times that two teams from the English Premier League could play each other in a single season?
So, let's work this out logically:
- 1 FA Community Shield match
- 3 Premier League matches (2 round-robin + if there is a tie for championship, relegation, or qualification to other competitions, additional play-off match is played. See this question)
- 2 League Cup matches (semi-final with 2 legs)
- 2 FA Cup matches (1 tie + replay)
- 2 Champions League / Europa League matches (2 legs of the knockout round, because teams from the same association cannot be drawn into the same group for Champions League or Europa League. See this question)
- 1 UEFA Super Cup match (if one side won the Champions League and another the Europa League in the previous season)
That's 11 matches.
BPL: 2+1 playoff in case of a tie in points, GD and goals scored.
Community Shield: 1
FA Cup: 2 with a replay
League Cup: 2, in a semi-final;could be three if the semi-final can have a third match (see the Champions League section)
Club World Cup: If it was hosted in England, the teams could meet. (1)
CL: Now this is the one that noone's gotten so far: The teams could face each other up to 5 times; it is possible for two clubs from the same country to play in the same group, IF the other team qualified as the winner of the Europa League. Then there's the possibility of a quarter- or a semi-final with a third match played in the case of aggregate goals being tied after the fielding(s) of ineligible players changing result(s) to 3-0.
UEFA Super Cup: 1
I count that as 15 or 16, depending on whether a League Cup semi-final can have a replay.