Isak's current contract situation has caught the attention of many potential suitors, as he has not yet signed a new deal, according to talkSPORT.
Arsenal are among the teams with the most serious interest in the Swedish forward.
Isak was a bright spot for the Magpies last season, even though they did not finish in the European places in the Premier League.
Fans will be hoping the club are able to tie him down to a new, long-term contract.