Manchester City midfielder Kalvin Phillips has "improved his level" and may play in Sunday's FA Cup third-round tie against Chelsea, says manager Pep Guardiola.

Guardiola criticised Phillips for being overweight on his return from England World Cup duty in December.

Phillips, a £45m signing from Leeds last summer, has played less than 10 minutes in the Premier League for City.

"I had the feeling last week that he's back," said Guardiola.

"It will maybe be a good lesson for him for the future. I have the feeling that a football player has to be, for 12 months, perfect. Even in holidays you have to be perfect.

"You can enjoy, you can do whatever you want, but you have to be ready because this level is so demanding. You have to play every three days, you have to be fit, and when you're not fit, nothing.

"In the last week, or days, he improved his level. In the Carabao Cup (quarter-final against Southampton on Wednesday) he is going to play and Sunday we will see."