The champions struggled for much of the game against the team that won the title a year before them, with Leicester creating a string of chances in the first half, thanks in large part to winger Riyad Mahrez. Cahill's clearance was eventually completed by a covering Rüdiger, which gave Cahill the opportunity to take a seat and receive some treatment.
Leicester on the other hand head to the capital sitting eighth in the table despite losing three of their last six matches so Charles Puel will also be keen to get back on track with a positive result tomorrow.
But Blues boss Antonio Conte had a different reason for his sides lack of determination against the Foxes.
Conte said he always planned to play "almost the same team" against the Foxes as he did against the Gunners in the Caraboa Cup. For Morata this is the first full season for him and he is learning a lot from this experience.
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Trump had certified the deal twice before, and senior officials have grudgingly said Iran is complying. Trump had faced a Friday deadline to decide on whether to waive the sanctions.
In contrast to Chelsea's lethargy, Leicester were electric, particularly Jamie Vardy, who harried the Blues' defenders, and in-form Riyad Mahrez, whose deflected shot nearly caught out Thibaut Courtois after the Belgian had been at full stretch to parry Ndidi's header.
Antonio Conte's Premier League champions are yet to win since calendars flicked over to 2018, drawing all four of their games in all competitions and failing to score in their last three.
Conte feels most of his top players were exhausted after the grueling first leg of the EFL Cup semi-final against Arsenal and it showed in their performance.
He said taking off Cesc Fabregas and Eden Hazard was an easy decision: "I saw they were were very, very exhausted". In truth, they didn't come close, with a Marcos Alonso free-kick, comfortably parried by Schmeichel, the best chance of note.
Somehow Conte must find time to rest and reinvigorate his squad - before draws turn to defeats.