The Sun reports that the duo are in disagreement over the club's transfer strategy.
Newcastle chief Paul Mitchell's relationship with manager Eddie Howe is being questioned.AdvertisementAdvertisementThe club's American chief exec Darren Eales is in the middle of the stoush, with Mitchell considering his future.
Eales wants both men to stay, but tension remains the pair.
Howe's issue is after early meetings with Mitchell there was sense he is being told how the team should play.
Mitchell was named technical director in June.