Coutinho: Liverpool real family club
The midfielder arrived in January from Inter Milan.
"When I found out about Liverpool's interest I was very happy as it is very good to know that people are watching and appreciate your work," he told liverpoolfc.com. "I am grateful for that.
"As soon as I arrived here, not just the manager but everybody at the club has been very nice and it's helped to relax me.
"It is a great club and like a big family - that is very important for a young player that has just arrived. It leaves me at ease to do the thing I love most, which is to play football."