Ba has spoken out this week at his frustration at Newcastle's style of play and has also admitted to being tempted by the speculation linking him with Arsenal.
However, it was after a lot of bets were placed on Thursday that bookmakers started reducing their odds on the move with SkyBet now offering just 1/2.
Another leading bookmaker's odds are similarly short at 4/6, with both offering 6/1 to Liverpool as the next most likely destination.