Hubert Kos Swims New US Open, World Cup Series Records With 48.78 100 Backstroke

2025 WORLD AQUATICS SWIMMING WORLD CUP – Westmont

• October 17-19, 2025
• Westmont, Illinois
• SCM (25 meters)
• Meet Central
• Psych Sheets
• Live Results
• Live Recaps:
  • Prelims: Day 1 | Day 2 | Day 3
  • Finals: Day 1 | Day 2 | Day 3

Men’s 100m Backstroke – Final

• World Record: 48.33 – Coleman Stewart (USA), 2021
• World Cup Record: 48.84 – Shaine Casas (USA), 2022
• World Junior Record: 48.90 – Kliment Kolesnikov (RUS), 2017
• U.S. Open Record: 48.92 – Matt Grevers (USA), 2015

Top 8 Finishers:

1. Hubert Kos (HUN) – 48.78
2. Thomas Ceccon (ITA) – 49.60
3. Kacper Stokowski (CLB) – 49.95
4. Finlay Knox (CAN) – 50.01
5. Miroslav Knedla (CLB) – 50.35
6. Enoch Robb (AUS) – 50.55
7. Ksawery Masiuk (POL) – 50.95
8. Grant Bochenski (CLB) – 51.18

Hubert Kos of Hungary posted a new World Cup Series record as well as a new US Open Record with a 48.78 in his 100 backstroke win. The previous World Cup Series record was a 48.84 set by Shaine Casas in 2022 while the old US Open Record was a 48.92 set by Matt Grevers back in 2015 at the Duel in the Pool.

Split Comparison

Kos was faster today on the 2nd 50 compared to Casas while he tied Grevers’ split in the 2nd 50.  Just a week ago, Kos posted a 49.08 in his win for the event.

In addition to breaking those records, Kos also snuck under his previous personal best of a 48.79 that he swam last December for silver at the 2024 SCM World Championships.

With his win tonight, he now has the chance to sweep all of the backstroke events at all three stops in the World Cup Series. The final stop is set to take place next weekend in Toronto, Canada.