The 2019 Frankfurt Marathon champion Valary Aiyabei and 2014 world half marathon bronze medallist Sally Chepyego were named as reserves.
The 37-year-old, Cheruiyot aims to compete at her fifth Olympic Games, a record tally for a Kenyan athlete.
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However, Paul Mutwii, AK senior vice president and director of competitions told Xinhua that the federation will make some adjustments to the marathon team in order to send a strong squad to the Games which is scheduled for July 23 to August 8.
Athletics - World Athletics Half Marathon Championships - Gdynia, Poland - October 17, 2020 Kenya s Peres Jepchirchir (R) in action [Reuters, Rafal Oleksiewicz]