Nike's losing major ground. Fed and Nadal are not going to be in many more major finals which is the most exposure for the brands. Also, Nike's investments in the next wave - Dimitrov, Harrison and Tomic has so far not paid off, or even come close.
Expect Nike to make a big push for Djokovic.
"I'm just givin em what they want. This is what they came for." --Jimmy Connors