The MDC says it has nothing to do with what it called 'the vicious dogfight to succeed Mugabe'.
A senior official has said that President Mugabe will instead appoint those he wants to work with.
The 'Sunday Mail' reported that Mujuru was linked to a plot to overthrow Mugabe.
Joice Mujuru has become a de facto opposition figure in the wake of unprecedented criticism.
A meeting of the party’s top decision-making body is expected to discuss Grace's corruption claims.
Grace Mugabe has accused Joice Mujuru of corruption and of dividing the ruling party.