Athletics: Mexican runs fastest 400m

Ana Guevara of Mexico was established as the clear favourite for the world championships in August after running the year's fastest women's 400m in 49.34s at the Prefontaine Classic in Oregon yesterday.

Olympic champion Cathy Freeman of Australia finished fifth on her international comeback. Top-ranked Guevara set a world best in the 300m this month.

The Prefontaine meeting produced an astonishing 11 season's best performances.