Dibaba and Keitany were 1-2 in LRC's 2015 World Rankings
and they'll be joined by three others in the top seven, including defending champ Tigist Tufa
, 2010 champ Aselefech Mergia
and Chicago champ/HM WR holder Florence Kiplagat
. Sara Hall
will also compete in a race that holds major Olympic implications for Kenya, Ethiopia and GB.