Ten-man Leicester produced an outstanding display to earn a point at third-placed Chelsea - although they should probably have come away from Stamford Bridge with all three.
The Foxes dominated possession for large periods and created the better chances but had the sting taken out of their display when defender Ben Chilwell received two yellow cards in the space of five second-half minutes. He was shown no mercy by referee Mike Jones in the 68th minute when he brought down Victor Moses, shortly after fouling Willian.
Claude Puel's side went close twice through Jamie Vardy, while Wilfred Ndidi's header was acrobatically pushed away by Thibaut Courtois.
The Blues are now level on points with second-placed Manchester United, who play on Monday.
Leicester have 31 points and remain in eighth.