Swansea City boss Paul Clement says they must not dwell on defeat to Chelsea.
The visitors felt aggrieved at being denied a second-half penalty when, with the score 1-1, the ball appeared to hit the arm of Cesar Azpilicueta.
Referee Neil Swarbrick dismissed the appeals and Clement did not approach him about the decision afterwards.
Clement said: "I thought it was a penalty. That should've been given.
"I've seen it again on the video and I think he (Swarbrick) had a good view of it."
On Pedro's goal, with a shot which went beneath the Swansea goalkeeper, Clement added: "Fabianski is disappointed. You could see from his reaction.
"You never want to lose a game, but the performance doesn't damage our confidence.
"We've had some really difficult away games, and picked up some good home results. The month of March is vital."