Ronaldo said: "Arsenal play fantastic football but I think we have a better team this season that we had last year.
"We have good players, a good spirit and we have to do the same as last season.
"We have a good chance, we are at the top of the league, Arsenal and ourselves, but I don't think it is just between the two teams.
"Chelsea and Liverpool are still there and are strong.
"I think we can challenge for the Champions League as well - we are through to the next round and I am looking forward to it."