Ben Chilwell’s 90t- minute strike looked to have given Leicester City all three points but Craig Dawson’s stoppage-time bicycle kick saw the hosts deservedly share the spoils at Vicarage Road.
Hornets midfielder Abdoulaye Doucoure missed the best chance of a lacklustre first half, firing straight at Kasper Schmeichel after Troy Deeney had nicked the ball away from Wilfred Ndidi on the edge of the Leicester box.
Moments after the restart, Ismaila Sarr had an even better opening after being sent clear by Etienne Capoue but Schmeichel was out sharply to make a superb sprawling stop.
Caglar Soyuncu should have found the net with a header from close range after James Maddison’s terrific free-kick delivery, though VAR may have ruled him too have been marginally offside.
The Foxes twice thought they’d won it late on, first as Marc Albrighton rattled the postwith a fierce strike before, seconds later, Maddison looked to have found the far corner only to be denied by an excellent low save from Ben Foster.
Chilwell then did put them ahead with a magnificent hit, finally beating Foster and seeing the ball ping into the net off the woodwork, but Dawson hit back to square things up.