All eyes on 400m rematch between Miller-Uibo and Felix

Athletics - World Athletics Championships - Women's 400 Metres Semi-Final - London Stadium, London, Britain – August 7, 2017. Shaunae Miller-Uibo of Bahamas. REUTERS/Phil Noble

LONDON (Reuters) - The stage has been set for an enticing rematch between Shaunae Miller-Uibo and defending champion Allyson Felix in the World Championships 400 metres, as both women qualified comfortably for Wednesday's final.

Felix got the better of Miller-Uibo in this event two years ago in Beijing to win her first 400m gold.

However, the Bahamian got revenge in spectacular fashion in Rio last year, diving over the line to snatch Olympic gold from the American.

Athletics - World Athletics Championships - Women's 400 Metres Semi-Final - London Stadium, London, Britain – August 7, 2017. Allyson Felix of the U.S. in action. REUTERS/Dylan Martinez

Miller-Uibo was never troubled in her opening heat on Monday, winning in a time of 50.36 seconds in front of Jamaica’s Stephenie Ann McPherson.

Felix, going for a record 14 world championship medals, qualified second fastest in her heat just behind 19-year-old prodigy Salwa Eid Naser of Bahrain, who bettered her national record from the heats by running 50.08.

There will be three Jamaicans in the final as Shericka Jackson, who won bronze in Beijing and Rio, made it through via one of the non-automatic places along with compatriot Novlene Williams-Mills.

Athletics - World Athletics Championships - Women's 400 Metres Semi-Final - London Stadium, London, Britain – August 7, 2017. Shaunae Miller-Uibo of Bahamas wins a semi-final heat. REUTERS/Fabrizio Bensch

(Reporting by Christian Radnedge; Editing by Ossian Shine)

Athletics - World Athletics Championships - Women's 400 Metres Semi-Final - London Stadium, London, Britain – August 7, 2017. Allyson Felix of the U.S. in action. REUTERS/Kai Pfaffenbach

Athletics - World Athletics Championships – women’s 400 semi final – London Stadium, London, Britain – August 7, 2017 – Shericka Jackson of Jamaica and Allyson Felix of USA compete. REUTERS/Lucy Nicholson