I don't see the connection between what he wears and how tough the loss will be to deal with.
Last years Wimbledon outfit was a throw back. It was classy, that's Roger's image. I don't think it's going to go away or dissipate or make him look like a fool if he loses a final dressed that way.
If you don't like how he dresses with Nike then you don't like it, if you do you do. Win or lose.
It might just be me, but I don't get it.
I wouldn't be too worried about Wimbledon guys, his game has gotten much stronger the last month and grass mostly Wimbledon are his favorite times of the year. After all the talk, and doubt I don't think he'll be leaving Wimbledon with anything less than another title.