This promises to be one of the most open of the men s events.

Middle distance fans will witness some of Kenya s best athletes in Melbourne later this month at the opening leg of the IAAF World Challenge series on 22 March.

US pair Ajee Wilson and Chanelle Price have enjoyed breakthroughs indoors this winter to occupy the top two positions on the 2014 world list with 2:00.43 and 2:00.48, respectively, after their one-two finish at the US Indoor Championships.

A re-run of last year s 2013 IAAF World Championships is a possibility, with four of the top five finishers from the Moscow final having been entered.

The big question is: can Vincent Kipruto retain his title at the 69th annual Lake Biwa Marathon, the oldest marathon in Japan and an IAAF Gold Label Road Race, on Sunday (2)?

The provisional entry lists for the IAAF World Indoor Championships in Sopot, Poland, is now available.