The former Dundee United man scored on his debut yesterday.
Celtic snapped up Gary Mackay-Steven and Stuart Armstrong from upcoming League Cup finalist opponents Dundee United on deadline day and the pair both found the net last night.
The fact both of them scored carried a humour not lost on Armstrong. He told Celtic TV that he and Mackay-Steven had got some stick since arriving, for being somewhat inseparable - so the fact they both scored on debut was not a shock:
“Gaz [Mackay-Steven] got us off to the perfect start and that settled all the boys in, especially me.
“All the boys have been giving us a bit of stick that we do everything together since coming in, so when he got one I had to get one as well."
Armstrong had attracted plenty of Premier League interest before joining Celtic and the fact is he is a real coup for The Bhoys and their Norwegian manager. Armstrong is certainly happy with his new boss. He went on to state how Deila is letting him and his fellow newbie settle in, and he also promised there is much more to come from himself. The 22-year-old said:
“He has been keeping things simple and covering the basics and adding bits as he goes and that’s been good for me, helping me settle in.
“He gave me a chance against Thistle and I felt I did okay and got a goal, but I will have to keep up these performances if I want to stay in this team.”
Celtic remain top of the SPL and have now won seven games on the trot.