So, let's work this out logically.:
- 1 Charity ShieldFA Community Shield match
- 2 Premier League3 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 CupLeague Cup matches (semi-final with 2 legs) - no replay Capital Cup
- 2 FA cupFA Cup matches (1 tie + replay)
- 2 Champions League Champions League / Europa LeagueEuropa 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 CupUEFA Super Cup match (if one side had onewon the Champions League and otheranother the Europa CupLeague in the previous season)
That's 10 matches.
Additionally, the Premier League reserves the right to organize a play-off if needed to determine the champions or other positions.
So 11 in totalmatches.
* Teams from the same national association cannot be drawn into the same group for UEFA Champions League or UEFA Europa League competitions. See this question.