IAAF World and Olympic champions Melaine Walker and American Sheena Tosta will renew their rivalry over the women’s 400m hurdles when they meet in one of the hotly anticipated events on today, the Rio de Janerio Grand Prix, starting at 1:00 pm Jamaica time.

The event is the sixth and final stop on the Brazilian athletics tour and will see five other Jamaicans competing.

Walker will have compatriot Nickesha Wilson in the race as she goes up against the American in a repeat of the Olympic finals in Beijing 2008.

Walker, who will be competing over the barriers for the third time this season, has a season best 54.96 seconds, third best in the world so far and just ahead of the American’s 55.65 seconds.

Wilson, the IAAF Continental Cup champions last year and 2007 World Championships finalist, will be competing in the event for the second time this season after running 57.57 seconds in Guadeloupe earlier this month. After lowering his personal best to 10.06 seconds in the 100m in the previous meet held on Sunday in Sao Paulo, two-time IAAF World Youth Championships gold medallist Dexter Lee will seek to turn the tables on Great Britain’s Dwayne Chambers who has won two races in a row in the South American country.

Chambers ran a season’s best 10.01 seconds to beat 20-year-old Lee on Sunday. Another Jamaican, Kimmari Roach, who was second in Unberlandia a week ago but was disqualified on Sunday, will also be in the race.

World Championships finalist and relay gold medallist Simone Facey will race in the 200m and will be seeking to go under the 23-seconds mark for the first time. She will go up against the American pair of Porscha Lucas and Shareese Woods.

After failing to make a legal mark in a meet in Puerto Rico, long jumper Alain Bailey will make his second appearance of the season in the event.