Chelsea defender Gary Cahill says new manager Antonio Conte added spirit, organisation and a lot of discipline to the team.
The Blues kicked off their Premier League campaign with a hard-fought 2-1 home win against West Ham United.
The Englishman says he felt "really sharp and fit" throughout the 90 minutes as he praised all pre-season sessions done under the Italian manager.
"He's added spirit, he's added organisation and a lot of discipline," Cahill told Chelsea's official website.
"Players know exactly what their role should be at each individual time they're on the pitch. He's added fitness, against West Ham I felt really sharp and really fit, it's one of the toughest pre-seasons I've done.
"It's not enjoyable when you're doing it but you reap the rewards and I felt really strong in the game.
"He wants to win. You can see how animated he is on the side of the pitch and he's like that when we're working. He wants to win, just like the rest of us.
"[After] we conceded we showed great character to come back and win the game, we got what we deserved. We can take a lot of confidence from the game."
