Defender Micky van de Ven has a "minor injury" and will be "touch and go" for Sunday.
Dominic Solanke is "still building" but is now "ready to start".
On his side's form: "It has not been perfect, but the past 10 games have been more consistent. We have competed better, especially over the full 90 minutes."
Frank added that "it is a transitional season" and admitted he expected to be higher in the league.
He revealed the club tried to sign Antoine Semenyo, who joined Man City from Bournemouth for £65m this month: "It was clear the club wanted to sign Semenyo, and it is a clear signal that the Lewis family are committed. That would have been a big signing financially."
On whether more business will happen before Monday's deadline: "If we are unable to get players in, then it will be a big summer ahead. I have no doubt we will see big improvements there."
Pep Guardiola is the "best coach in the world", but Frank hopes to find areas to exploit Manchester City.