Newcastle midfielder Sissoko is said to be interesting rival Premier League sides.
The French midfielder is well known as desiring a move to a Champions League side, and if a top four team bids for him, the Magpies will consider selling him.
The report states that, whilst no concrete offers have been made for him, there is knowledge of interest in him ahead of the mid-season transfer window.
Newcastle will be open to accepting an offer, as they are aware they can raise their asking price considerably due to it being the January window, when the transfer market is always inflated.
However, they are well aware that Sissoko has been one of the best Newcastle players of the season, and understand that selling him could have an adverse effect on their season - which has already been extremely poor.
Newcastle do not want to have an unhappy player on their hands though, and will seriously consider any offers if they are from a Champions League club with Sissoko looking for his transfer to a top club.
The report states that the Magpies could ease the blow of losing Sissoko in January by reinvesting the cash in a new signing, with Anwar El Ghazi of Ajax said to be a priority target.