Chelsea announced their return to the Champions League with a ruthless display to crush Qarabag 6-0.
New boy Davide Zappacosta produced the pick of the Premier League champions’ six goals, capping a 70-yard sprint with a cross-shot which embarrassed keeper Ibrahim Semic on 30 minutes.
Pedro had earlier given Chelsea a fifth-minute lead with a fine strike from the edge of the box.
Cesar Azpilicueta headed in a third ten minutes after the break.
Tiemoue Bakayoko stroked home the fourth with 19 minutes left while Michy Batshuayi weighed in with late strikes on 76 and 82 minutes.
Antonio Conte had made five changes to the side victorious at Leicester last Saturday with Eden Hazard, Alvaro Morata, David Luiz, Victor Moses and Bakayoko dropped to the bench.
The win leaves Chelsea top of Group C with Atletico Madrid, their opponents on September 27, held at Roma.
Chelsea now turn their attention to Sunday when they face London rivals Arsenal in a match that is likely to have a huge bearing on their title credentials this season.