The game ended 2-2 at Liberty Stadium
Diego Costa's late bicycle kick earned Chelsea a 2-2 draw at Swansea City.
The Blues had seen a 1-0 advantage become a 2-1 deficit, before the Chelsea forward pounced on a rebound to preserve the Blues' unbeaten start to the season.
Costa gave the Blues the lead when he swept in on 18 minutes.
The London side appeared comfortable until a three minute spell around the hour mark turned the game on its head.
First, goalkeeper Thibaut Courtois lunged in on Gylfi Sigurdsson to concede a penalty which the Icelandic midfielder converted.
Shortly after that, Leroy Fer caught Gary Cahill in possession, with complaints over a foul, and raced clear before poking in via Courtois.
But Costa acrobatically equalised when Branislav Ivanovic's shot was blocked into his path.