The youngster's mistake saw Sunderland share the points with Claude Puel's side on Saturday.
Guardiola says he is unlikely to hand a start to the Chile international.
The Guinean has joined the Italian side despite interest from Villa.
Joe Garner made his debut for Rangers on Friday evening.
The Tottenham defender appeared to tug Joel Matip back from a corner.
Leeds lost 3-1 at Nottingham Forest at the City Ground.
The former forward left his coaching role with the Gunners this summer.
The striker has fallen out of favour under Jurgen Klopp.
Palermo defender Achraf Lazaar is set to join Newcastle.
Netherlands national team manager Blind approves of Janssen’s summer switch to White Hart Lane.