Chelsea were frustrated by a disciplined Sevilla as their opening Group E fixture in the Champions League ended in a cagey 0-0 draw at Stamford Bridge on Tuesday.
Europa League winners Sevilla, who have been a thorn in the side of English clubs in Europe, contained Chelsea's attacking threats in a game of few clear chances.
Sevilla dominated possession in the first half with Nemanja Gudelj's header forcing a save from Edouard Mendy.
Yet it was a night of defensive superiority as Chelsea manager Frank Lampard experienced his first 0-0 draw since taking over before the start of last season.
Julen Lopetegui's side showed again that they are a tough nut to crack with a measured away performance, restricting Chelsea to six goal attempts, their lowest total in the Champions League since February 2015 against Paris Saint-Germain.
"I think the important thing was a clean sheet," former Leicester City fullback Chilwell told BT Sport. "People were looking at us after conceding three on Saturday but definitely we were solid and they didn't have that many chances."
Mendy dealt comfortably with Sevilla's three attempts on target and showed fine reactions to claw away Gudelj's awkward header in the first half.
After Chelsea's initial burst at the start of the second half, when Christian Pulisic began to threaten and Werner had one decent effort from long range, Sevilla ended strongly.