A win at Antonio Conte's side.
The Toffees have won every home game they've played in 2017. Eight opposition sides have arrived at Goodison Park since the turn of the year and all eight have gone home empty-handed.
It's a fate, given the form of Tottenham, Chelsea will be desperate to avoid. A defeat coupled with a Spurs win over Arsenal later that afternoon would diminish the Blues' lead at the top to just a single point.
Conte is unlikely to take any risks against Everton. The Chelsea boss is in the fortunate position at this stage of the season of having no injuries to contend with.
He has the entirety of his squad to choose from but is likely to go for the tried and trusted. So expect the same side who started the 4-2 win over Southampton on Tuesday night.
The big challenge for the Blues is stopping Romelu Lukaku. The striker, who is a Chelsea transfer target, has struck in his last nine outings at Goodison Park – a run that has equalled a club record.
Keeping the powerful Belgian subdued will be key to Conte's side's chances of securing three points.