The fact Chelsea required a late equalizer from Diego Costa to avoid defeat against Swansea City concerned Antonio Conte.
Antonio Conte hailed Chelsea's spirit for scoring late to earn a 2-2 draw against Swansea City, but was frustrated his team had failed to kill off the game beforehand.
Diego Costa opened the scoring in the first half but a Gylfi Sigurdsson penalty, awarded after Thibaut Courtois caught the Iceland international in the box, and an effort from Leroy Fer put Swansea ahead after the restart.
Fer's effort appeared to be preceded by a foul on Gary Cahill, but referee Andre Marriner allowed play to continue and the Dutchman ran through to score.