Nottingham Forest head coach Ange Postecoglou says he "cannot afford to waste time" as he seeks to implement a new style of play at the club.
The Australian's first game in charge ended in an emphatic defeat with a 3-0 loss away at Arsenal.
The 60-year-old was appointed as Nuno Espirito Santo's successor on Wednesday and vowed to build a side in his image.
While there was evidence of stylistic changes against Arsenal, Forest managed just one shot on target against the Gunners and registered a lower expected goals (xG) than in any game Premier League match under Nuno.