Celtic assistant manager Shaun Maloney has been speaking to the media before Wednesday's Scottish Premiership meeting with Aberdeen. Maloney says the Scottish champions are "really happy" with their four summer signings so far and "there's some key positions that we still need a bit of work on in the next couple of days". The assistant manager says "the profiles of what we need in those positions are really important, that we do replace what we've lost", citing Arne Engels' recent departure.