Chelsea boss Frank Lampard paid tribute to his backroom staff for the form of Christian Pulisic.
The 21-year-old has three goals since the restart and set up Olivier Giroud's winner against Norwich City last time out.
"I've seen real improvement in his all-round game," said Lampard. "Coming to the Premier League is very difficult because of the physical nature of the league. We have to remember how young Christian is and also the summer that he had.
"I think he found those physical demands pretty strong in the beginning and now you're seeing him deal with those better. A lot of that is a credit to himself and how he's approached it - he's worked with our strength and conditioning coach Adam Burrows, who's fantastic, but they've worked together so it's Christian who has to take on that responsibility and he has.
"Physically that's helped him but it's also just his talent is coming through. Looking forward, I want to see more of what he's shown in recent times which is goals and assists because that's what the best in the world do in that position. I feel he has the capability to do that as he improves and that can be the edge as his game moves on levels."
