The Brazilian playmaker was heavily linked with a move to Barcelona during the closing stages of the summer transfer window as the Spanish side looked to bolster their attacking options.
However, despite reports of some big money offers being made, Liverpool refused to sell the 25-year-old, who only signed a new five-year contract with the Reds back in January.
Coutinho has now been reintegrated back into first team affairs at Anfield following the transfer saga, and he has scored two goals and made one assist in five games in all competitions.
The playmaker could be set to feature for the Reds when they come up against Benitez’s Newcastle United side in Sunday’s Premier League clash at St James’ Park.
And Benitez says that Coutinho staying at Liverpool for another season will work out positively for both the club and the player.
Speaking at a news conference on Friday, Benitez said: “They (Liverpool) have a good team.
“I understand some players, they are thinking about going because they have big offers, but Coutinho is in a very good team, a very strong club.
“So, I think he will be fine and he is scoring goals already.
“I know him because he was my player at Inter, when he was a young player.
“He is a very good player and, to be there, I think he will be fine. You can understand, players receiving massive offers but, anyway, he is in a top side.”
Liverpool are aiming to make it back to back wins in the Premier League after their thrilling 3-2 victory over Leicester City last weekend.
The Reds finished fourth in the Premier League table under Jurgen Klopp last term.
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