Kenya's Dennis Kimetto and Ethiopia's Tirunesh Dibaba are among the runners to beat in Sunday's Chicago Marathon, where Kenya's Florence Kiplagat seeks her third consecutive Chicago crown.
Dibaba, who owns the world 5,000m record of 14:11.15, will be tested by Kiplagat, who won last year in 2:21:32, nearly two minutes ahead of runner-up Edna Kiplagat.