Chelsea chief Ron Gourlay says any new manager must meet their expected targets.
Gourlay has also defended the Chelsea's rapid turnover of managers in recent years, with Carlo Ancelotti the fourth man in as many years to leave.
"Continuity is very important but so is performance and results," said Gourlay.
"Our model may not be the model others agree with but at the end of the day, we've taken the decisions we felt we needed to take to develop Chelsea football club... and we've won 10 major trophies in the last six years."
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