TOP of the Premiership, unbeaten domestically and in the Champions League - there hasn't been much to upset the apple cart at Celtic this season. But Hoops legend John Hartson has questioned one of the Hoops' biggest summer signings. 2 Adam Idah has chipped in with four goals despite his lack of starting chances Credit: Kenny Ramsay 2 John Hartson has questioned Celtic's decision to re-sign Idah Credit: Kenny Ramsay Celtic were held to a 2-2 draw by Aberdeen at Parkhead on Saturday after surrendering a two-goal lead, but after eight league matches the defending Premiership champions have still yet to lose a game.
They're in the Premier Sports Cup semi-finals and are gearing-up for another mouth watering Champions League clash, this time against Europa League winners Atalanta in Bergamo. Celtic waved goodbye to fans' favourite Matt O'Riley in the summer when he completed a big money switch to Brighton. But Hoops chiefs spent big to strengthen Brendan Rodgers ' squad, despite losing their main man.
READ MORE CELTIC STORIES 'I CAN'T CHANGE' Brendan Rodgers launches blistering defence of Champions League tactics ATALANTA V CELTIC Hoops look to get Champions League campaign back on track in huge clash Arne Engels arrived from Augsburg in an £11million deal , while £6m Auston Trusty was another big outlay. Celtic also spent £9.5m to bring back Adam Idah from Norwich.
The Republic of Ireland international was a huge hit during a loan spell from the Canaries during the second half.