After a historic Boston Marathon where a massive atmospheric assist and aggressive footwear sent course records tumbling, the eyes of the running world pivot to the streets of London this Sunday, April 26. While Boston was a race about conditions, London 2026 is a race about calibre.
However, the “Super Sunday” many fans were expecting has undergone a massive structural shift. Injuries and training setbacks have reshuffled the deck, turning the women’s race into a spotlight for a different set of stars and the men’s race into a battle of the “New Guard.”
The Women’s Race: The Re-Shuffled “Big Three”
The headline for London was originally a rematch of the Paris 2024 Olympic podium. But as of mid-April, that narrative has changed following significant withdrawals.
The Major Withdrawals:
- Peres Jepchirchir (KEN): The 2024 champion and reigning World Champion has officially withdrawn. Jepchirchir has been battling a stress fracture . This injury delayed her training block and forced her to concede that she is not at peak condition for a London defense.
- Sifan Hassan (NED): The 2023 champion and Olympic gold medalist is also out. After a legendary multi-year peak, Hassan has opted to prioritize recovery, stripping the contest of one of its most potent tactical kickers.
The New Showdown: Obiri vs. Assefa vs. Jepkosgei
- Hellen Obiri (KEN) — The Headliner: With Hassan and Jepchirchir out, Obiri is now the main attraction. Making her London debut, she brings a “Major Win” streak that is unparalleled in the current era, including back-to-back victories in Boston (2023, 2024) and NYC (2023, 2025). Obiri has already signaled ominous form this year, winning the NYC Half in 1:06:33.
- Tigst Assefa (ETH) — The Record Holder: Assefa returns as the defending champion and the holder of the women-only World Record (2:15:50). Her PB in a mixed gender race is 2:11:53, which was later on broken by Roth Chepngetich (currently suspended). After finishing second to Jepchirchir in a tight sprint in 2024, she is the clear favorite to target another fast solo time on London’s flatter terrain.
- Joyciline Jepkosgei (KEN): The 2021 champion is arguably the woman in the best “pure speed” form. She won the 2025 Valencia Marathon in a staggering 2:14:00, the fourth-fastest time in history. On a flat course, she remains the primary threat to Assefa’s dominance.
The Men’s Race: Chasing the Ghost of Kiptum
The men’s field remains remarkably intact and is widely considered the strongest ever assembled for a spring major.
- Sabastian Sawe (KEN) — The Defender: Sawe won London 2025 and Berlin 2025. He has openly stated he is targeting Kelvin Kiptum’s course record of 2:01:25. Sawe holds a 2:02:05 PB and a 58:05 half-marathon, representing the peak of modern “speed-first” marathoners.
- The Ugandan Triple Threat: Jacob Kiplimo (Half-Marathon World Record holder, 56:42) and Joshua Cheptegei (5,000m/10,000m World Record holder) are both confirmed. Kiplimo, the reigning Chicago champion, was the runner-up to Sawe last year and is seeking his first London title.
- Tamirat Tola (ETH): The reigning Olympic Champion (Paris 2024). Tola is the “engine” of the group. If the pace becomes erratic, his ability to sustain high-threshold effort usually breaks the speedsters late in the race.
- The Debutant: Yomif Kejelcha (ETH) is set to make his much-anticipated marathon debut. As one of the fastest track athletes in history, his transition to 26.2 adds a layer of unpredictability to the lead pack.
Technical Outlook: What to Watch For
- Metabolic Efficiency: Following the 2:01:52 seen in Boston last week, London’s pace will likely be aggressive from the gun. We expect the lead men’s pack to target a 60:30 half-way split to test the legs of the track specialists like Cheptegei and Kejelcha.
- Shoe Rivalries: London is the home turf for Nike and Adidas. Watch for the Nike Alphafly 3 and Adidas Adios Pro 4 to be the primary weapons on the podium. London’s flat, 19-turn course rewards shoes with superior lateral stability over the pure vertical bounce preferred on Boston’s hills.
- The Women-Only WR: Despite the dropouts, the duel between Assefa, Obiri, and Jepkosgei is perfectly balanced for a record attempt. The 2:15:50 mark is officially on notice.
The Marathon Journal Verdict
London 2026 won’t have the atmospheric assist of Boston, but it has the deepest pool of talent on the planet. For the first time, Hellen Obiri is the hunted, not the hunter. Whether she can handle the “flat and fast” pace of Assefa and Jepkosgei will be the defining technical story of the weekend.
