Australian Open champion Novak Djokovic suffered an injury scare at the Hopman Cup when the world number one hurt his leg as fans pushed towards him while he signed autographs.
Djokovic had wrapped up a 6-3, 6-4 victory over Italian Andreas Seppi at Perth Arena when the incident happened.
The Serbian left his racquets and bag on the court and limped straight up the players tunnel to receive a medical assessment in the locker room.
He was unable to complete a television interview he had agreed to after his victory over Seppi.
Djokovic only arrived in Perth from Abu Dhabi late on Sunday and says he was troubled by jet lag.
"I felt this morning that I was dream-walking," he said. "I broke the ice after the first set and started to feel better."
Serbia held an unassailable 2-0 following Djokovic's win and he later returned to the court to partner Ana Ivanovic in the dead mixed doubles rubber, where they lost 7-6 (7-4), 6-4 to Seppi and Francesca Schiavone.
Earlier, Ivanovic had begun the day by beating Schiavone 6-0, 6-4.
Djokovic is taking part in the mixed teams event to be guaranteed at least three matches in his build-up to the Australian Open, which begins on January 14.
ReutersTags: tennis, sport, perth-6000 First posted December 31, 2012 17:43:15