Sport Today - Kelvin Kiptum: 'Two-hour marathon barrier will be broken before long' - 成人快手 Sounds
Sport Today - Kelvin Kiptum: 'Two-hour marathon barrier will be broken before long' - 成人快手 Sounds
Kelvin Kiptum: 'Two-hour marathon barrier will be broken before long'
Athletics journalist Alex Seftel discusses Kelvin Kiptum's marathon record time.