Olivier Giroud was Chelsea's match-winner for the second time in as many UEFA Champions League games as he scored all four goals in a 4-0 victory over Sevilla that clinched first place in Group E for the Blues.
Giroud, making his 50th start for the club, was at his clinical best as he took his tally to 10 goals in his last seven away starts in the competition and ensured Chelsea go into the round of 16 as one of eight seeded teams.
He was the beneficiary of some fine build-up play as Kai Havertz and Callum Hudson-Odoi staked their claim for more regular first-team football in an impressive performance from a changed Chelsea team.
Sevilla went into this game unbeaten in 14 home matches in all European competitions but were scuppered by Frank Lampard's hardworking side, who blocked low for long periods but attacked fluently.
After scoring with either foot, Giroud capped a fine performance with a towering header and then a penalty as he became the oldest player to score a Champions League hat-trick, at 34 years and 63 days.
Havertz tested Sevilla's debutant goalkeeper Alfonso Pastor - a late addition after Tomas Vaclik pulled up in the warm-up - with a swerving effort in the opening minute, and the Germany international assisted the opener moments later.
He was allowed to glide through the Sevilla defence and roll the ball to Giroud, who took a touch to control it before opening up his body and finding the far corner of the net with his shot from 12 yards.
Franco Vazquez then cleared a powerful Antonio Rudiger header off the line but Chelsea found themselves pressed back in the latter stages of the first half as Sevilla tried to turn superior possession into goals.
The hosts emerged with renewed intent after the interval and Jesus Navas' audacious flick with the outside of his boot picked out Nemanja Gudelj, who half-volleyed narrowly over the crossbar from 20 yards.
But Giroud struck again on 54 minutes, latching onto Mateo Kovacic's pass before shrugging off Sergi Gomez and clipping a shot over Pastor and into the far corner of the net.
N'Golo Kante, on as a substitute, strode down the Chelsea right with 16 minutes left on the clock and landed a deft cross onto the head of Giroud, who powered the ball high into the net.
The France World Cup winner then won a late penalty from Gomez that he confidently converted into the corner of the net to complete an historic night.