He alone has operated at that level since then .
Bekele has held the world records at 5000m ( 12 : 37.35 ) and 10,000 m ( 26 : 20.31 ) since 2004 .
Bekele alone has operated at that level since then .
Bekele has held the world records at 5000m ( 12 : 37.35 ) and 10,000 m ( 26 : 20.31 ) since 2004 .