Coutinho arrived in January from Inter Milan.
"Suarez is phenomenal - he is otherworldly," said the £8.5million signing.
"The goals he scores, the way he gives himself to the team...it is very important and I am very happy to be able to play next to him.
"I think it's the way he gives himself to the team. He doesn't let one ball go - even if it's the hardest one.
"He fights all the time to win and I admire that in a player. I think it is one of his strong points.
"I'm not only happy to play next to him, but also other players like Steven, who is phenomenal too.
"These are guys from another world!"