World Athletics ratified Jacob Kiplimo’s half-marathon world record of 57:20 on Thursday, 179 days after he set it in Lisbon. Yomif Kejelcha’s 56:51 run in Buenos Aires awaits ratification.

Kiplimo’s record was ratified 11 days after Kejelcha’s run. The Lisbon race took 10 seconds off the previous ratified record of 57:30, set by Kejelcha in Valencia. Read more racing coverage.

Kiplimo’s record was initially rejected due to pacing issues in Barcelona. He later ran 57:20 in Lisbon without pacemakers, securing the record. Kejelcha’s new course in Buenos Aires requires separate validation. Related: Edmonton Marathon: 13 Boston Qualifiers Invalidated.

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