The Serb shows off his fitness on the Aussie Open practice courts.
Andy Roddick and Brooklyn Decker have added a second child to their growing family roster.
Ninja chooses sonic core technology.
Garbine Muguruza, Caroline Wozniacki and Alexander Zverev in triple-stripe styles.
Master Maestro's serve following these five steps.
"Ranking for me doesn't matter that much anymore," says former No. 1.
James Blake donating Davis Cup jacket for worthy cause.
