World records are under threat from male and female runners at the London Marathon on Sunday (3:30 a.m. ET, NBCSN and NBC Sports Gold).
The forecast calls for the warmest London Marathon in its 38-year history (a high Sunday in the low 70s, though likely cooler for the morning start times).
The elite fields, stronger than for last Monday’s Boston Marathon, include the greatest marathoners of this generation — Eliud Kipchoge and Mary Keitany — plus arguably each Kenyan’s top rival at the moment.
Five runners to watch in each field …
Eliud Kipchoge, Kenya
2016 Olympic champ
2015, 2016 London Marathon winner
Ran 2:00:25 in Nike’s sub-two-hour marathon attempt last May
In Kipchoge’s last start in London, he missed countryman Dennis Kimetto‘s world record by eight seconds, prevailing in 2:03:05 in 2016.