Mane has been one of Liverpool's most impressive performers so far this season.
Coutinho said of the Senegal star: "He's a fantastic player.
"He's very quick, he's got very good feet, so that helps us to create a lot of chances to score - not just him but as we saw in the game, Daniel [Sturridge], [Roberto] Firmino, [Adam] Lallana up there too.
"The manager has a lot of options to choose from.
"Everyone's been working hard in training, so for sure, it's good for the manager to have options to choose from, and it's good for Liverpool."