Asbel Kiprop of Kenya (L) races through a corner with teammate Daniel Kipchirchir Komen during their men's 1500 metres semi-final at the IAAF World Championships in Daegu September 1, 2011. REUTERS/Lee Jae-Won (SOUTH KOREA - Tags: SPORT ATHLETICS)

Asbel Kiprop of Kenya (L) leads Ciaran O'Lionaird of Ireland (C) and Daniel Kipchirchir Komen of Kenya (R) through a corner during their men's 1500 metres semi-final heat at the IAAF 2011 World Championships in Daegu, September 1, 2011. REUTERS/Mark Blinch (SOUTH KOREA - Tags: SPORT ATHLETICS)

Daniel Kipchirchir Komen of Kenya (2nd L) sprints to the finish line ahead of Chaminda Indika Wijekoon of Sri Lanka (L), Nicholas Willis of New Zealand (C), Matthew Centrowitz of the U.S. (2nd R) and Mohamed Moustaoui of Morocco (R), to win the men's 1500 metres heat at the IAAF World Championships in Daegu August 30, 2011. REUTERS/Michael Dalder (SOUTH KOREA - Tags: SPORT ATHLETICS) 

Daniel Kipchirchir Komen of Kenya (front) sprints to the finish line to win the men's 1500 metres heat at the IAAF World Athletics Championships in Daegu August 30, 2011. REUTERS/David Gray (SOUTH KOREA - Tags: SPORT ATHLETICS)

Augustine Kiprono Choge of Kenya (R) crosses the finish line to win the 1500m Men event, ahead of compatriots Geoffrey Kipkoech Rono (L) and Daniel Kipchirchir Komen, at the IAAF Diamond League athletics meeting in Rome June 10, 2010. REUTERS/Ciro De Luca (ITALY - Tags: SPORT ATHLETICS) 

(L-R) Kenya's Daniel Kipchirchir Komen, Ethiopia's Deresse Mekonnen and Juan Carlos Higuero of Spain pose with their medals during the award ceremony for the men's 1500 metres at the 12th IAAF World Indoor Athletics Championship in Valencia March 9, 2008. Mekonnen won the gold medal, Komen took silver and Higuero won bronze. REUTERS/Heino Kalis (SPAIN) 

Kenya's Daniel Kipchirchir Komen bites his silver medal during the award ceremony for the men's 1500 metres at the 12th IAAF World Indoor Athletics Championship in Valencia March 9, 2008. REUTERS/Heino Kalis (SPAIN) 

Kenya's Daniel Kipchirchir Komen (front) competes to win the final of the men's 1500 metres at the 12th IAAF World Indoor Athletics Championship in Valencia March 8, 2008. Photo taken March 8, 2008. REUTERS/Heino Kalis (SPAIN) 

Daniel Kipchirchir Komen of Kenya (L) leads to win in the men's 1500m race at the IAAF 5th World Athletics Final 2007 in Stuttgart, September 23, 2007. REUTERS/Kai Pfaffenbach (GERMANY) 

Daniel Kipchirchir Komen of Kenya reacts winning in the men's 1500m race at the IAAF 5th World Athletics Final 2007 in Stuttgart, September 23, 2007. REUTERS/Wolfgang Rattay (GERMANY) 

Kenya's Daniel Kipchirchir Komen wins the men's 1500 metres during the IAAF Brussels Golden League athletics meet (Memorial Ivo Van Damme) at the King Baudouin stadium in Brussels September 14, 2007. REUTERS/Yves Herman (BELGIUM) 

Daniel Kipchirchir Komen (2nd L, rear) of Kenya and Youssef Baba (808) of Morocco compete in the men's 1500 metres semi-finals at the 11th IAAF World Athletics Championship in Osaka August 27, 2007. REUTERS/David Gray (JAPAN) 

Daniel Kipchirchir Komen (C) of Kenya and Youssef Baba (on the ground) of Morocco fall in the men's 1500 metres semi-finals at the 11th IAAF World Athletics Championship in Osaka August 27, 2007. REUTERS/David Gray (JAPAN) 

Daniel Kipchirchir Komen (C) of Kenya and Youssef Baba (on the track) of Morocco fall in the men's 1500 metres semi-finals at the 11th IAAF World Athletics Championship in Osaka August 27, 2007. REUTERS/David Gray (JAPAN) 

Daniel Kipchirchir Komen (3) of Kenya falls over Youssef Baba (808) of Morocco as Bernard Lagat (1113) of the U.S. and Mehdi Baala (556) of France run to the finish line during their men's 1500 metres semi-finals at the 11th IAAF World Athletics Championships in Osaka August 27, 2007. REUTERS/Michael Dalder (JAPAN) 

Daniel Kipchirchir Komen (bottom L) of Kenya and Youssef Baba (bottom R) of Morocco lay on the track after falling as Tarek Boukensa (306) of Algeria, Bernard Lagat (1113) of the U.S., Mehdi Baala (556) of France, Mohamed Moustaoui (822) of Morocco and Mekonnen Gebremehdin (536) of Ethiopia run to the finish line during their men's 1500 metres semi-final heat at the 11th IAAF World Athletics Championships in Osaka August 27, 2007. REUTERS/Michael Dalder (JAPAN) 

Daniel Kipchirchir Komen (3) of Kenya falls over Youssef Baba (808) of Morocco as Tarek Boukensa (306) of Algeria, Bernard Lagat (1113) of the U.S., Mehdi Baala (556) of France and Nicholas Willis of New Zealand run to the finish line during their men's 1500 metres semi-finals at the 11th IAAF World Athletics Championships in Osaka August 27, 2007. REUTERS/Michael Dalder (JAPAN) 

Daniel Kipchirchir Komen (3) of Kenya falls over Youssef Baba (808) of Morocco as Tarek Boukensa (306) of Algeria, Bernard Lagat (1113) of the U.S. and Mehdi Baala (556) of France run to the finish line during their men's 1500 metres semi-finals at the 11th IAAF World Athletics Championships in Osaka August 27, 2007. REUTERS/Michael Dalder (JAPAN) 

Daniel Kipchirchir Komen (L) of Kenya and Youssef Baba (C) of Morocco sit on the track after falling in the men's 1500 metres semi-finals at the 11th IAAF World Athletics Championship in Osaka August 27, 2007. REUTERS/Mary Jane (JAPAN) 

Kenya's Daniel Komen Kipchirchir wins the men's 1,500 metres race during the Brussels Golden League athletics meet (Memorial Ivo Van Damme) at the King Baudouin stadium in Brussels August 26, 2005. Kipchirchir won the race in a time of 3 minutes 31.13 seconds. REUTERS/Yves Herman FLR/mk 

Daniel Kipchirchir Komen of Kenya runs to win men's 1500 metres race at Zurich Golden League meeting in Switzerland. Daniel Kipchirchir Komen of Kenya runs to win the men's 1500 metres race at the Zurich Golden League meeting in Switzerland August 19, 2005. Kipchirchir Komen won the race in a time of three minutes 30.49 seconds. REUTERS/Sebastian Derungs 

Kenya's Kipchirchir Komen runs in the 1500 metres event at the Flanders Indoor athletics meeting in Ghent. Kenya's Daniel Kipchirchir Komen runs in the men's 1500 metres event at the Flanders Indoor athletics meeting in Ghent, February 6, 2005. Kipchirchir Komen won the race in 3 minutes 35.61 seconds. REUTERS/Francois Lenoir 

Kenya's Daniel Kipchirchir Komen runs in the men's 1500 metres event at the Flanders Indoor athletics meeting in Ghent, February 6, 2005. Kipchirchir Komen won the race in 3 minutes 35.61 seconds. REUTERS/Francois Lenoir FLR/SM