Sifan Hassan and Peres Jepchirchir clash at the World Athletics Half Marathon Championships Gdynia 2020, their recent world record-breaking feats have been ratified.

Jepchirchir’s 1:05:34 women-only world half marathon record and the one-hour world records from Hassan (18,930m) and Mo Farah (21,330m) are now official.

The 26-year-old Kenyan, who won the world half marathon title in 2016, was paced through the first five kilometres in about 15:20. She broke away from the rest of the lead pack just a few minutes later and reached 10km in 30:32.

“I was hoping to run about 1:04:50, but I’m so happy,” said Jepchirchir, who set a world record of 1:05:06 in a mixed gender race in Ras Al Khaimah in 2017, a mark which stood for seven weeks. “I was really tired in the last five kilometres.”

Hassan and Farah, meanwhile, stormed into the record books at the Wanda Diamond League meeting in Brussels on 4 September, the night before Jepchirchir's race in Prague.

Hassan’s record came after a titanic battle with Kenya’s world marathon record-holder Brigid Kosgei, although it later transpired the latter had been disqualified for stepping on to the infield in the closing stages.

“I was very excited to be back on the track,” said Farah, who had announced his retirement from track racing at the end of the 2017 season. “With just 10 laps to go, it became tough so I was happy that Bashir took the lead, but I felt great with just one minute to go. A fast last lap is still my best tactic.”

“I didn't feel good before the start of the race,” said Hassan, who last year set a world record for the mile. “After 30 minutes of racing, I finally felt better. When there were only two minutes left on the clock, the fun began.”