The Portuguese attacker has scored 33 goals for Real in all competitions this season, including 28 in La Liga.
Since returning from a two-match ban incurred for his dismissal at Cordoba in January, Ronaldo is yet to find the back of the net in two domestic outings - one of which was Real's 4-0 defeat at the hands of rivals Atletico Madrid.
"He had a nice performance against Deportivo La Coruna in terms of physical skills. He showed great intensity," Ancelotti said.
"I think he is getting better, he just needs to score a goal and I think he has a great chance to do it tomorrow [Wednesday]."
"We are highly motivated, as we keep the first position in the table of La Liga, so the biggest motivation is to win La Liga," the Italian coach said.
"It works exactly the same for this competition. We are the current holders and we will do our best in order to be European champions again."
