Former Manchester United captain Roy Keane has concerns about his old team ahead of the new season.
Keane played for the club during their Premier League golden era and was part of seven title triumphs.
But United have not been champions of England since 2013 and finished as low as eighth last season.
United have made four major signings since the end of the previous campaign, bringing in Dutch forward Joshua Zirkzee and defenders Leny Yoro, Matthijs de Ligt and Noussair Mazraoui.
But Keane believes that Erik ten Hag's side are still short in two key positions.