If opponents keep treating Lleyton Hewitt like this, he might be able to go on a serious run at this year's Australian Open.
The soon-to-be retired Aussie champ was floored by an incredible act of sportsmanship from American youngster Jack Sock at the Hopman Cup on Tuesday night.
Serving down 4-5 in the first set of their singles match, Hewitt had his first serve at 30-0 called wide. But as Hewitt returned to the service line and prepared to send down his second serve, Sock surprised everyone in attendance by saying to his opponent: "That was in if you want to challenge it."
Hewitt could barely believe his ears and appeared uncertain as to whether his opponent was telling the truth, or perhaps trying to trick him into wasting a challenge.
But he eventually took Sock at his word and called for the chair umpire to review the call. When Hawkeye revealed the ball was catching the line, the crowd roared.