The Bhoys boss has been discussing Aberdeen, Dundee United and Inverness Caledonian Thistle.
Aberdeen, Dundee United and Inverness Caledonian Thistle (and Hamilton) are all within six points of Celtic in what is proving to be a relatively close SPL season so far.
And Deila is wary of the qualities 'title-challengers' United, Aberdeen and Inverness possess.
“It’s going to be a tough season and there are a lot of games still to play,” the Celtic boss told reporters. “Dundee United, Aberdeen and Inverness are all good teams – and they’re our title challengers.
"They’ve all had some momentum, and just now it’s Aberdeen who’re playing well. We just need to prepare well for every game and try to win.
“In terms of the results, it’s been good but I see so much potential here - it’s just on the way to something here.
"When I see the possession we have, the pressure have, the way we control games, it’s about turning possession into goal chances."