Only two months after his retirement, Lleyton Hewitt is "on standby to make a comeback" in this weekend’s Davis Cup tie against the U.S. amid concerns about the health of Nick Kyrgios, according to Courtney Walsh of THE AUSTRALIAN. A virus has "sapped energy from the 20-year-old," who finally made it to Kooyong Wednesday afternoon. After winning a title in Marseille and reaching a semifinal in Dubai last week, Kyrgios "fell ill with a virus that also flattened other players." Whether Kyrgios is "fit to take on an opposition consisting of John Isner, Jack Sock and Bob and Mike Bryan is far from certain." The Australians "are considering several contingency plans." The chance remains Hewitt "will step in" given a situation Jason Stoltenberg described as "not ideal," with the Australia coach opting against ruling out the prospect. Stoltenberg said, "He thought he was retired and he's hitting more than these guys. It's probably the fist time a captain's had to get out and prepare as if he may play." The American side is "mindful" that Hewitt may play, with Bob Bryan saying that they "won't be surprised" if he does (THE AUSTRALIAN, 3/3).