Manchester City manager Pep Guardiola has delivered a stern warning to Jack Grealish over his form.

City paid £100m to sign Grealish from Aston Villa last summer.

The Englishman has taken time to ease into life at the Etihad, but Guardiola wants him to deliver now.

Asked if it would take until next season for Grealish to produce his best, Guardiola said: "He'll be in trouble [if so] - we want to see it now.

"We've six or seven months left, with a lot of nice things, we want to see it this season

"I would say he's settled perfectly, he knows many English players, and the other guys are nice people.

"He's not a problem, he plays good, but has to find a bit of time, if you analyse the games, he's not played bad.

"With the quality he has, it's difficult to play badly. Playing every three days, its different for him, but he did it incredibly well.

"What he did at Villa was amazing, helping them get up and stay there. Now, in the international break, he came back injured, but he'll come back step by step and we'll see his form."