Paris - Olympic 800m champion David Rudisha will return after nearly a year out injured at the Diamond League meet in Doha on May 9, organisers said on Monday.
The 25-year-old Kenyan world record holder twisted his knee in training in New York last May, and could not defend his title at last year's world championships in Moscow.
It will the sixth time he has competed in the Qatar event which is the first in the 14-leg Diamond League calendar this season.
Organisers also confirmed a high jump duel between Russian Olympic champion Ivan Ukhov and local hope Mutaz Essa Barshim, the London Games bronze medallist.
Ukhov edged closer to Cuban Javier Sotomayor's world record 2.45m mark, with the Russian jumping 2.42m indoors this winter.
All eyes will be on Ethiopia's Genzebe Dibaba, who broke the world indoor records over 1500m and 3000m in February.