Chelsea midfielder Andre Schurrle has revealed how he followed the advice of manager Jose Mourinho and worked on his body strength.
The 23-year-old netted a second-half hat-trick to earn Chelsea a 3-1 victory over west London rivals Fulham on Saturday, in his first Premier League start since the turn of the year.
Schurrle accepts it was always going to take time for him to adapt to the hustle-and-bustle of English top-flight football - which has included plenty of work on building up his physique.
"We talked a lot, of course. He told me I needed to change, to change my game and my body, and that is what I have done over the last two months," said Schurrle.
"I have really worked very hard to be aggressive, to be in a good shape with my body. Now I'm ready to play more often.
"I did a lot in the gym, but I wanted to do this, I needed to do this. The manager told me it as well, I wanted to change and I think I have."
The win at Craven Cottage has given Chelsea a four-point advantage at the top of the table, and the team can strengthen their position next weekend with Arsenal and Manchester City both in FA Cup action.
And Schurrle believes Chelsea must seize the opportunity to put pressure on the other challengers.
"We have to believe it. I think everyone believes it now. We have worked hard for this," Schurrle said. "We have to keep going, keep winning like we did at Fulham, then we will see at the end."