New platform will host Davis Cup live streaming this weekend.
Rivals' comments were "not kind" said former world No. 1.
Serena and baby bond in new photo.
Dominik Hrbaty, Tommy Haas also scheduled to play.
Hall of Famer says McEnroe has tried to create another Battle of the Sexes match.
Former No. 1 featured in campaign by Mario Testino.
US Open finalist details Rafael Nadal's championship qualities.
