The midfielder has been fine form for Liverpool this season.
The Brazilian midfielder has been one of the star men for the Reds this season as they have started the campaign strongly.
So far he has three goals and two assists in their first seven games, both of which are the second most of any player at the club.
It has continued the fine development Coutinho has shown over the last year since Jurgen Klopp took charge at Anfield.
His performances mean he is now banging on the door of the elite level players and Souness has now likened him to Andres Iniesta.
“I think Coutinho if he’s on fire he makes them [Liverpool] tick,” he told Sky Sports.
“He’s an Iniesta type, he’s capable of goals but most importantly he’s capable of making the right pass at the right time in the last third of the pitch. When he’s at it, Liverpool are at it.”
The Reds will now be hoping that Coutinho can be the star man when they take on Manchester United this evening.
A win for Klopp’s side could take them level at the top of the Premier League alongside Manchester City and Arsenal.
It is likely to be a tight affair between the pair at Anfield and Klopp’s team will need the likes of Coutinho at the top of their game to ensure they take away all three points.