Hewitt said in a statement Wednesday that Kokkinakis, who returned recently from 18 months off the tour with shoulder and abdominal injuries, "has always shown commitment to the Davis Cup team."
"A great competitor. Always getting the most out of himself," said Lleyton Hewitt, a two-time major champion whose career overlapped Roddick's. "Left it all out on the court every time he stepped out there. Looked like he did all the hard work, as well, to try and prepare himself as well as possible."