Olympic 800m silver medallist Francine Niyonsaba set a new 2,000m world record at the Continental Tour Gold meeting that was held on Tuesday (14) night in Zagreb.
Her time of 5:21.56 seconds was two seconds faster than the record set by Genzebe Dibaba indoors in 2017.
The world 800m silver medallist, became the sixth fastest woman over the 3000m in history at the Paris Diamond League Meeting is also among several athletes banned from competing between 400m and 1500m because of naturally high levels of testosterone.
However she was forced to move up in distance due to the new rules relating to testosterone levels and at the Tokyo Games where she finished in fifth in the 10,000m final in 30:41.93.
Her world record run, which also broke the outdoor record set by Ireland’s Sonia O’Sullivan in 1994, came a week after claiming victory over 5,000m in the Diamond League meeting in Zurich.
The 2,000m has never been held at an Olympics or World Championships but is often featured at track and field meetings.