Good luck everyone!
PS: I'd already posted my choice and only edited to wish everybody good luck. And I didn't change anything.
No worries, you are allowed to change your pick if you want to. It's best to quote yourself and indicate the change then. Since you didn't change your pick no confusion could have followed.
Good luck to you too
And to all of us! It all or none, Nishikori is the pick du jour.