Real Madrid coach Zinedine Zidane said he was delighted to be able to call on the best player in the world in Cristiano Ronaldo as his side gear up to defend their Club World Cup title.Ronaldo won his fifth Ballon dOr, for world player of the year, last week to draw level with his rival and Barcelona forward Lionel Messi.The debate about who is the greater player is a perennial feature of soccer punditry, but Zidane is convinced he has the worlds best at his disposal. I have the best in the world and he is showing it in this shirt, Zidane told a news conference in Abu Dhabi on Tuesday. I am delighted to have him, for me he is the best.