Alisson says he is happy at Liverpool, and open to extending his stay at the club beyond this summer.The 34-year-old goalkeeper is out of contract at the end of June and his representatives are in discussions with the club to decide what happens next.Liverpool decided to take up the option of a one-year extension last summer and have so far called on Alisson in every game except for the Carabao Cup, when Giorgi Mamardashvili has played.