Willian scored twice and Olivier Giroud got his first Chelsea goal as they cruised into the quarter-finals of the FA Cup.
Pedro also scored in a one-sided fifth-round tie at Stamford Bridge, where Hull’s David Meyler had a penalty saved by keeper Willy Caballero early in the second half.
Willian opened the scoring after just 107 seconds, bending a left-footed strike beyond keeper David Marshall after Kevin Stewart had given the ball away.
Pedro made it 2-0 on 27 minutes, finishing off a nice team move by firing past Marshall after being found by Cesc Fabregas’ ball over the top.
Willian struck again five minutes later, taking his tally for the season to 10 – again after Stewart gave the ball away.
Giroud won possession and found the Brazilian, whose right-footed shot gave Marshall little chance.
The Frenchman, who was involved in all four goals, started after passing a fitness test, while Emerson Palmieri made his Blues debut.
And Emerson set up the fourth, breezing past Meyler and delivering the ball to Giroud at the near post, where the French striker applied the finish with a deft touch.
Four down at the interval and being totally outclassed, Championship side Hull were handed a chance to pull a goal back when Harry Wilson was brought down by Fabregas five minutes after the restart.
However, Caballero dived to his right to keep out Meyler’s spot-kick.
Willian almost completed a hat-trick when he shot against the post after being set up by the exciting Callum Hudson-Odoi in the final minute.
Teenager Ethan Ampadu again impressed at the heart of the Chelsea defence, while youngsters Hudson-Odoi and Kyle Scott came on as substitutes.
