That challenge isn't coming from today's 20-time-top-flight-champion visitors Manchester United, though. It's been a stuttering start for Jose Mourinho, who was close to being out of a job if you believe what you read in the newspapers ahead of their last game with Newcastle.
But he's still here, and will head back to his old hunting ground this afternoon, and somewhere that has brought him far more personal accolades than his time at Old Trafford has afforded him so far.
Maurizio Sarri's side have started superbly after a poor campaign under Antonio Conte last season - so will they be singing the Blues at full-time today?
Kick off is at 11:30 GMT.
Stay with us for all the updates.
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