He warned: "With Carlos Tevez, Nani and Anderson, we are more heavyweight this season.
"Now, when teams come to shut up shop, we have more ways of unlocking them. It's exciting. We're certainly better than last year. And if defenders want to put the boot in, I'll keep taking it. I'm used to it now."
Ronaldo added: "I was delighted that Real Madrid were so interested in signing me, but United have become everything to me. I'm going to be here for many years and I'm going to be very happy."