Viduka is looking for a new club following the expiration of his contract at Newcastle last week.
Fulham have been linked with the the 33-year-old and Viduka's representative, Steve Kutner, admits two Premier League sides have expressed an interest in the forward.
"Mark is mulling over two offers from two very good sides," Kutner told the Sunday Sun.
"His reason in continuing to play on at the top level in England is to make sure he is there in South Africa. He's feeling fit again and he's hungry."