After making just three appearances for Manchester United this season, the 21-year-old winger was sent out on loan to Wales for the remainder of the campaign.
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Zaha made an instant impact in his debut against Norwich City on Saturday to help secure Solskjaer's first Premier League victory as a manager and the Norwegian claims that his loan signing could be an Old Trafford great if he remains dedicated.
"He is one of the best I have seen with the ball," the Cardiff boss told reporters. "He has quick feet and is brave like Cristiano and wants to go forward.
"But he has got to make a decision about how good does he want to be and how much does he love this game. He can grow up to become a proper player like Ronaldo if he wants.
"I have never seen anyone work as hard as Ronaldo. Before training, after training, he was an exceptionally dedicated man and proved to everyone what dedication gets you.
"I am not afraid of using Sir Alex Ferguson or Cristiano as an example when I have to because to get the best out of your talent you need to be dedicated. It's a desire and attitude from within. It's what you've got in your heart and Cristiano's always had it."