The Sakho saga was probably a heated exchange on the US pre-season tour. Klopp and Sakho going at it in front of other players and Klopp taking the stance that he won't ever play again for us.
With Coutinho it was FSG's decision to make sure he got reintegrated into the team. I'm sure Klopp given the choice would rather leave Coutinho on the sidelines but he's FSG's pride and joy next big asset and they sure as hell don't want anything jeopradising the price tag!
Sakho's behaviour following the drugs ban/no ban for taking dodgy substances was the problem, I'm sure the dodgy substances was the first nail in the coffin, whatever it was, it was clear it was over for him under Klopp, so best we got rid.
Coutinho is a top player whether we like the way he behaved or not, as long as he gives his all and is professional, I am happy for him to play for us. I am sure it's Klopps choice if Coutinho plays or not, I cannot see FSG instructing Klopp on team selection, or him accepting it.
The Simple fact is he's one of our best players, so if fit, is likely to play, looking at the dearth of creativity in our midfield, with Lallana out, we are better with him playing, I can see him playing midfield this season.