Newcastle United and Joe Willock are locked in talks over his move to Tyneside.
The Magpies have agreed a fee with Arsenal for the midfielder.
However, Sky Sports suggests that 21-year-old Willock and Newcastle are not in agreement over personal terms.
Willock, who scored eight goals in 14 games for Newcastle on loan in the second half of last season, wants a big pay rise on his present deal at Arsenal.
The two parties are not close to an agreement on his wage, which could put a potential move in jeopardy.
Newcastle boss Steve Bruce will be hoping the money men can find an agreement in the coming days.
