Chelsea knocked out Derby in the Carabao Cup fourth round as Frank Lampard’s return to Stamford Bridge as a manager ended in a dramatic defeat.
Five goals were scored in a frantic first half, including two own goals from Derby defenders Fikayo Tomori and Richard Keogh.
The Championship side came from behind twice through Jack Marriott and Martyn Waghorn.
But Cesc Fabregas slotted home four minutes before half-time for what proved to be the winner.
Derby substitute David Nugent hit the inside of the post with a minute of normal time remaining but it rebounded safely into goalkeeper Willy Caballero’s hands.
Chelsea have been drawn at home to Bournemouth in a repeat of last season’s quarter-final.
Arsenal will face Tottenham Hotspurs in the 5th round of the Carabao cup after they both progressed with victories over Blackpool and West Ham respectively.
Arsenal beat Blackpool 2-1 and Spurs beat West Ham 3-1.