But Ronaldo is confident that he will get back to his best form this or next season.
“Tell me one player who had a great season for two, three, four years at the top level? It’s impossible, you don’t have anyone,” he told Sky Sports.
“Last season I think I did brilliant but this season, in my opinion, I’m not bad, I’ve scored 10 goals up to now, I’ve come in from injury and people are waiting (for me to get) better and better all the time.
“It is not easy but I know I feel in good form and I think Cristiano is coming better and better.
“If not this season, then next season I know I can do as well again.”