Antonio Conte has, however, kept faith with the majority of those to have been contained by the Gunners.
Conte then used up the rest of his substitutions by sending on Willian and Pedro for Eden Hazard and Fabregas, and the Brazilian started to cause problems for the visitors with his direct running.
On Friday Conte had described Leicester as the "worst team" his tired group of players could come up against this weekend, following their midweek Carabao Cup semi-final first leg, and Foxes boss Claude Puel was left ruing a missed opportunity to take all three points off the defending champions.
Leicester's relentless pressing made it hard for the Blues to create opportunities, even after they were reduced to 10 men following the second yellow card shown to Ben Chilwell. But that was simply not to be.
The draw has now put Conte's men level with Mourinho's side, who have have a game in hand, which is bad considering that there was a point in late December when they were favorites for the second spot after dismal showings by the Red Devils. Leicester were the better side and created more opportunities, excelling in the first half before dropping much deeper after the break.
Chelsea head coach Conte on Saturday said the feeling was mutual and that he would not be losing any sleep over the matter, insisting again he was stopping the verbal sparring.
"We showed a lot of quality and played well".
Speaking in an interview with Chelsea's website, Rudiger said: "The whole team is with him [Morata] and I think I can speak as well for the fans, they are also with him".
That's three 0-0 draws in a week now for the Premier League champions, who have a Champions League tie with Barcelona to look forward too in a couple of weeks. I thought that two games, after two-and-a-half days, for the same players was normal to recover.
"I'm not anxious. I'm not anxious. But I think I saw a lot of players very exhausted", Conte said.
Having opened his account for the season in last weekend's FA Cup win over Fulham - setting up a fourth-round clash with the Hornets - Ward-Prowse picked up where he left off.
I never see this type of mistake in the Premier League before.
OVER AT SELHURST PARK: Bakary Sako's sixth goal of the season gave Crystal Palace a 1-0 win over Burnley and moved Roy Hodgson's side further away from the relegation strife that once threatened to engulf their season.
Plane skids off runway and dangles over a cliff
The Pegasus Airlines flight descended into chaos when it tried to land at the ice covered Trabzon Airport in Turkey . Trabzon Governor Yucel Yavuz said that all of the passengers and crew on board had escaped uninjured.