Ronaldo returns to Old Trafford on Tuesday for the second-leg of their Champions League tie.
England defender Jones, 21, said of the United old boy: "He is probably the best player in the world.
"He has everything. His balance, his movement and he is quick, strong and has a shot with left and right.
"I thought we dealt with him reasonably well in Madrid - but we all know we have to do it again."