The Brazil international has been heavily linked with a move to Barcelona this summer, with the Catalan giants reportedly looking for a long-term Andreas Iniesta successor.
The 24-year-old got his name on the scoresheet to help Liverpool beat Middlesbrough 3-0 at Anfield yesterday, securing their place in the top four and next season's Champions League.
And after the game Coutinho, who cost Liverpool just £8.5million from Inter Milan in the summer of 2013, pledged his long-term future at the Merseyside outfit.
REUTERS
Philippe Coutinho scored as Liverpool beat Middlesbrough
Liverpool star Philippe Coutinho plays down Barcelona move
When asked about the Barca link, Coutinho told ESPN Brasil: "I have a long contract with Liverpool.
"Speculations are for journalists only."
Coutinho put pen to paper on a new long-term contract at Liverpool earlier this season, keeping him at the club until 2022.
And Liverpool boss Jurgen Klopp has urged Coutinho to stay put, suggesting he has the potential to become a club legend.
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The German said: "Stay here and they will end up building a statue in your honour.
"Go somewhere else, to Barcelona, to Bayern Munich, to Real Madrid, and you will be just another player. Here you can be something more."
Coutinho is yet to claim any silverware during his four years at Liverpool, but has contributed 42 goals and provided 37 assists in his 181 appearances.