Philippe Coutinho has pledged to continue to do his best for Liverpool but refused to commit his future to the club. The Brazil international was frustrated when his transfer request was rejected in the summer as the club rebuffed three bids from Barcelona. Since then speculation has continued to encircle Countinho, who scored a hat-trick in the 7-0 demolition of Spartak Moscow to book their place in the knockout stage of the Champions League, with his Catalan suitors reportedly ready to make another approach. "I am at Liverpool and I always do my best when I have the opportunity to play, respecting the jersey and the supporters," said Coutinho.