The dog days are back in Brazil in a sure sign spring is coming.
Donna Vekic and 12 Americans receive wild cards.
In his Acapulco final loss, Nadal produces major winner.
Kyrgios solidifies his status as must-see Tennis TV.
Keys is first American Evian ambassador.
Two-time French Open champion may not receive Roland Garros wild card.
Hall of Famer heads roster that includes Bouchard, Isner and Fish.
