HT: Manchester City 1-1 West Bromwich Albion
Stephane Sessegnon scored a screamer to fire West Brom into a shock lead at the Etihad Stadium.
The Baggies midfielder beat Joe Hart at his near post with a thunderous right-foot strike on six minutes.
But Sessegnon then went from hero to zero.
Within 15 minutes of his superb opener, he gave away a soft penalty.
Aleksandar Kolarov was felled in the box, allowing Sergio Aguero to mark his 200th City game with his 130th goal.