EDMONTON, Canada Gabriela Szabo won her first major 1,500 meters title on Tuesday then kept the world waiting while she slept on a decision whether to compete in the 5,000 heats in two days' time.

The twice world 5,000 champion and Sydney gold medalist outsprinted fellow-Romanian Violeta Szekely to win the 1,500 in four minutes 00.57 seconds.

She then said she would wait until the morning before deciding whether she would run on Thursday.

Szabo has threatened to boycott the 5,000 meters in protest at the International Association of Athletics Federations (IAAF) decision to allow Russian Olga Yegorova to compete despite a positive drugs test.

Yegorova failed a test for the blood-boosting drug epo (erythropoietin) but has been allowed to compete because the test did not conform to International Olympic Committee specifications, Reuters reported.

Later, on a cool, overcast evening, Derartu Tulu led an Ethiopian clean sweep in the women's 10,000 meters while Amy Mbacke Thiam won Senegal's first world medal of any kind in the women's 400,

Tulu, Olympic champion in 1992 and again last year in Sydney, led an Ethiopian trio who tracked the hapless Paula Radcliffe as the Briton made another brave but ultimately doomed victory bid.