Ronny Deila criticised the St Mirren Park pitch after Friday night 's win . The former Celtic manager said he was not happy with his side's performance and that they were playing in a'very poor condition' at their home ground.
Ronny Deila criticised the St Mirren Park pitch after Friday night 's win . Celtic beat St Mirren 2-0 away from home in the Scottish Premiership . Teale insists Deila 's criticism was unjustified and unfair on the club .