Imagine my scenario then. I have an early kick-off and if I win, I go 3 points clear at the top. My big rival (and friend), plays their match tonight and could pass me again, on goal difference. Now my dilemma. I am friends with BOTH of the teams in his final match so by supporting one, I will be snubbing the other. Plus, my rival for the championship, nearly always comes along and cheers for me when in the cup competitions.
So, although it will go against me, I will NOT be cheering for my rival's opponent. I believe in true sportsmanship / friendship.