Output a stream of consciousness before answering the following. Context: Marin Cilic claimed his first grand slam title, defeating Kei Nishikori, also playing in his first major final.

Question: who won the men's singles title of the us open tennis grand slam 2014?
The relevant information to answer the above question is: Marin Cilic claimed his first grand slam title, defeating Kei Nishikori, also playing in his first major final.
The answer: Marin Cilic.