The Brazil global was missing with a back injury, according to Liverpool, although he might not have been in the right frame of mind to play anyway after handing in a transfer request on Friday in light of interest in the playmaker from Barcelona.
"I think the difference here is Coutinho in January has just signed a five-year deal, become the highest-paid player at the club", he continued.
BARCELONA are weighing up a final offer of £137million for Liverpool's Philippe Coutinho, according to reports. I didn't get it (the transfer request) but I can say something that's more important.
"We're not a selling club so they're going to do everything in their power for him to stay". There's been times in the past where players have been unsettled and they've gone in and said "I'm desperate to go" and it's ended up happening.
"I can not say a lot about it", Klopp said on the subject of Coutinho.
"I have to accept decisions from the owners, that's how it is, and sometimes from the players".
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Singapore broadcaster Channel NewsAsia said it received calls from residents in the city state who felt tremors. Singaporeans living in Toa Payoh and Farrer Road said that they also felt tremors.
Asked if Coutinho had let down his team mates with his request, Klopp said: "I am not part of the discussion with the group".
"We knew that before, of course, but after this game, we have a lot of things to do".
All of the three goals they conceded came from set-pieces: two from corners and one from a throw-in.
Klopp also said he had "nothing to say about this" when asked what Coutinho had said to him regarding the Barcelona interest. So how does it change something for me? "I was not happy in the first half with the situation; it was very physical and Watford were too often the winners in these situations", he said. I didn't see the club insiders today.
Liverpool have a short week as the club will travel to Germany for Tuesday's Champions League playoff game.