Jon Walters scored two own goals and missed a penalty as Chelsea thumped Stoke to end the Potters’ 17-game home unbeaten run in the Premier League.
Walters headed a Cesar Azpilicueta cross into his own net just before half-time and repeated his unwanted trick from a Juan Mata corner.
Frank Lampard made it 3-0 from the spot after Mata was fouled and Eden Hazard smashed in a fourth from 30 yards out.
Walters’ misery was completed when he blasted a late penalty over the bar.
The 29-year-old Republic of Ireland international has won plenty of plaudits for his play for the Potters this season but his 100th Premier League appearance turned into a memorable day for all the wrong reasons.
Chelsea move third in the table with what became a runaway victory but they were under the cosh for long spells early on and were grateful to assistant referee Sian Massey for correctly reversing a decision to award Stoke a penalty with the score at 1-0.
Referee Andre Marriner pointed to the spot when Azpilicueta slid in to bring down Matthew Etherington inside the area, but Massey had already flagged Etherington offside.