The Blues captain was shown a straight red card for a high challenge on Burnley midfielder Steven Defour in their opener at Stamford Bridge after he had lost possession with a heavy touch.
It is the third consecutive match in which the Blues have received a red card, having had Victor Moses sent off in May's FA Cup final and Pedro removed in last week's Community Shield, both matches against Arsenal.
1 - Chelsea had gone 40 successive Premier League matches without a red card (since May 2015) before Gary Cahill's dismissal today. Off. — OptaJoe (@OptaJoe) August 12, 2017
However, it is the first red card Chelsea have received in league action for 40 matches.