The American broke Bekele’s 21-year-old indoor world record Friday night in Boston, clocking 12:44.09 just six days after Fisher also broke the world indoor record in the 3000m at the Millrose Games in New York City.

Just six days after he broke the indoor 3,000-meter world record, US middle-distance star Grant Fisher was once again celebrating on Friday, as he smashed the 5,000-meter indoor world record to cap off a dream week.

Grant Fisher became the first American to break a distance world record in a world indoor championships event in 22 years.

American Grant Fisher breaks his second world indoor record in six days with a new mark in the 5,000m in Boston.

American Grant Fisher smashed the world indoor 5,000 meters record at the Boston University David Hemery Valentine Invitational on Friday, just a week after setting the indoor 3,000 meters record. Fisher clocked 12 minutes 44.

Grant Fisher won the 5,000-meter race at the BU David Hemery Valentine Invitational in 12 minutes, 44.09 seconds, his second world indoor record within a week.

American Grant Fisher set the world indoor 5000 metre record late on Friday at the World Athletics' BU David Hemery Valentine International in Boston, smashing the previous mark set in 2004. The double Olympic bronze medallist charged through the line in 12 minutes 44.