Chelsea boss Frank Lampard said Christian Pulisic had “showed the full package” after the winger’s hat-trick in the 4-2 win at Burnley.

Pulisic scored with his left foot, his right and then his head to put the Blues 3-0 up at Turf Moor.

They were the United States international’s first competitive Chelsea goals and he caused a number of problems besides for Burnley on his first Premier League start since August.

Lampard said of the £58million signing from Borussia Dortmund: “I’m absolutely delighted for him.

“(There’s been) a lot of talk around Christian, for the big price tag, for the fact that he is quite rightly a star in his country. I’m delighted to see him do that today because I know the back story.

“I know he played for his country through the summer, then you get the pressure of ‘can you settle in the Premier League?’. So I’ve tried to deal with it in the way I see best, which is to give him minutes – he has played games this season already – but I’ve also got competition in that area.

“And I need them all on edge, trying to perform when they play. Christian has been doing that recently from the bench, fully deserved his start today and it was a fantastic, match-winning performance.

“I know what a good player he is. There are things obviously that he has to learn and improve, because he’s just turned 21.

“The way he has trained in the last few weeks and the impact he’s had when he’s been playing, it says to everyone ‘here I am’, and what talent he does have.

“It’s what we need from all our attacking players, to be a threat, play like that, have a ruthless edge about how they finish. He showed the full package today.

“I hope it gives him the confidence it should do, and I’m pretty sure it will do.”