Stoke City have already declared their interest in signing England international Parker. That approach will be eclipsed by Manchester City's £10m bid this month. City's new manager, Roberto Mancini, wants to bolster his midfield with 29-year-old Parker.
The threat of losing key men is a real danger to manager Zola.
Parker is one of West Ham's top earners and has thrived at Upton Park.
Since his formative days at Charlton he's been sold for about £20m in moves to Chelsea, Newcastle and West Ham.
But the Sullivan-Gold deal will offer stability and the chance to resist unwanted approaches. Parker will be told he must stay.
The only remaining danger will be if the midfielder decides he wants to join the Eastlands gravy train.