you don't notice the swoosh stamped on his forehead everytime he steps on court?
I can even tell you that the last time I noticed a Nike thing like that was on Del Potro : he only had a basic Nike mark on his all white tee-shirt, nothing else, and I thought for one second : what is it ? and realized
I don't know, maybe other players have too many things, then I don't notice
You see, it's for "blind" fans like me that Nike makes these ad campaigns
PS : Li Ning also had quite some success with me because their "corrected" "Nike-sign" shocks my eyes, and that's why I always notice it