Chelsea manager Frank Lampard praised Christian Pulisic, as the American forward scored an equaliser five minutes after coming off the bench to help his team earn a 2-1 comeback win at Aston Villa in the Premier League on Sunday.

Pulisic levelled on the hour after Kortney Hause had given Villa a 43rd minute lead, and Frenchman Olivier Giroud netted the winner two minutes later, tightening Chelsea's grip on fourth place.

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Lampard also singled out midfielder Ross Barkley and right-back Cesar Azpilicueta, who set up both Chelsea goals -- one with a superb cross from his flank, and the other with a sublime pass to Giroud from the opposite side.

"The individuals who make the difference should always take all the credit, so with Christian and Ross Barkley, who came on at the same time, they're both players who have trained well and had cases to start this game," said Lampard.

"We knew that fitness would play a part, so the idea of bringing on Christian and Ross early in the second half was always something that was in my mind.

"The way it was going, we needed a bit of inspiration, and Christian gave it with his goal. I thought Ross did really well, too. I keep saying to the players how important subs could be in this period, and they showed that."

"I thought Azpi was really good in the game. Obviously, he delivers the ball for Christian's goal and got really high up in areas."

The result left Chelsea on course for a Champions League berth next season, five points ahead of fifth-placed Manchester United and sixth-placed Wolverhampton Wanderers, with Lampard praising his team's character.

"We showed great character and quality in the second half to win the game, so I'm pleased. I thought we moved the ball pretty well for most of the game and dominated possession clearly."