Tulu won this event nine years ago
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Double Olympic gold medallist Derartu Tulu will run in the Great South Run in Portsmouth on 9 October.
The 33-year-old Ethiopian, who came fourth in the marathon at the World Championships in Helsinki, won the 10-mile event nine years ago.
Kenya's Paul Tergat, the marathon world-record holder, will also compete.
"She will see a great difference at the venue where the race is now one of the best on the world calendar," said race media director David Hart.