The top guys got the message that [Kei's] not going to go away.” Federer said about the 25-year-old. “I think that's why— maybe that's the biggest jump for him in my opinion, is also in the mind of the top players, knowing that he is the player he is now Doesn't matter what the score is, doesn't matter how long the match goes, you're aware that Kei is not going to go away.”