Cilic is strange player. He has a talent, but it is becoming very strange how he chokes when he serves for the set/match. And it is happening constantly with him.
It's a Croatian thing!
They have talent and physical abilities, but what they lack, is their mental abilities. Too temperamental to do anything big in their youth (see Goran, with game he had he should have won wimbledon 5 times, not lose 3 times in finals.....)
With that said, I do belive that Cilic has the best game of any Croatian player ever. What he needs to be top 10 is to improve 1st serve percentage as he can break anyones serve.