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After impressing in his last three substitute appearances for Chelsea, Christian Pulisic was rewarded with a first league since August.
The American international repaid Frank Lampard’s faith in him by scoring a hat-trick as Chelsea recorded a seventh victory in a row.
It was a perfect hat-trick for Pulisic as he scored with his left foot, right foot and header.
Pulisic opened scoring in 21st minute with his first Chelsea goal and doubled the lead on stroke of half time
He added another goal with a header in the 56th minute before Willian found the net two minutes later.
Burnley scored twice late to reduce the deficit.
Chelsea remain in fourth place in Premier League table after the 4-2 victory over Burnley.