Cardiff City 1-2 Chelsea
Lethargic Chelsea scored twice in the last six minutes as they came from behind to win 2-1 at relegation-threatened Cardiff City.
The Bluebirds looked set to win only their ninth match of the campaign until Cesar Azpilicueta headed home from what appeared to be an offside position and substitute Ruben Loftus-Cheek then grabbed a 90th-minute winner for the visitors.
Victories on Saturday for Burnley, Crystal Palace and Southampton had piled the pressure on Neil Warnock's team who are now five points away from safety with only seven games of the season left.
A dull first half of few chances was edged by Chelsea who had penalty appeals ignored in the fourth minute when Antonio Rudiger fell to the ground. Eight minutes later Pedro beat Sean Morrison but then curled a 20-yard shot onto the roof of the net.
At the other end, Josh Murphy's shot flew wide and, just past the half-hour mark, Lee Peltier's sidefooted effort was straight at Chelsea goalkeeper Kepa.
Seven minutes before the interval Willian narrowly failed to hit the target with a free-kick before Marcos Alonso contrived to slice a shot from only eight yards out wide of the Bluebirds goal.
The match opened up in the second half and, soon after the restart, Victor Camarasa volleyed Harry Arter's cross past Kepa to give Cardiff a shock lead.
Maurizio Sarri responded to his side going behind by bringing Eden Hazard on for Pedro but the home team continued to play well.
Chelsea were restricted to half-chances with Mateo Kovacic blasting a 25-yard shot over Neil Etheridge's goal before Loftus-Cheek was unable to force the ball home after a goalmouth scramble.
Willian flashed a shot across the face of goal with 15 minutes remaining but, in the 84th minute, Azpilicueta scored the controversial equaliser before Loftus-Cheek got his head to Willian's cross to boost the Blues' push for the top four and potentially condemn Cardiff.