Lukas Märtens Negative Splits 7:39.10 800 Free Performance At Swim Open Stockholm

by Retta Race 48

April 15th, 2025 Europe, International, News, Records

2025 SWIM OPEN STOCKHOLM

The 2025 Swim Open Stockholm concluded tonight with Germany’s Lukas Märtens following up his astounding 400m freestyle World Record with another huge swim, this time in the 800m free.

23-year-old Märtens blasted a winning effort of 7:39.10 to beat the field by 2 seconds en route to registering a new lifetime best and lowering his own former national benchmark.

His teammate and 1500m freestyle victor here Florian Wellbrock snagged the silver medal in 7:41.10 while Oliver Klemet made it a German sweep with a time of 7:44.92 for bronze.

Entering this competition, Märtens’ career-swiftest performance checked in at the 7:39.48 produced for bronze at the 2023 World Championships.

Although he was just .38 ahead of that previous result, the man negative-split his race by a large amount this time around.

Märtens opened in 3:51.07 on the front half but sped his way to 3:48.03 on the back 400m, nearly 3 seconds faster.

Splits by 200:

  • 1:53.42
  • 1:57.65
  • 1:55.91
  • 1:52.12 (!!!!!)

Of note, China’s Zhang Lin also negatively split his race when setting the longstanding World Record of 7:32.12 in 2009 – 3:46.79/3:45.33 – including an other-worldly final 200m of 1:51.76.

Märtens bumped himself up to now rank as the 9th-best performer in history.

Top 10 Men’s LCM 800 Freestyle Performers All-Time

  1. Zhang Lin (CHN) – 7:32.12, 2009
  2. Ous Mellouli (TUN) – 7:35.27, 2009
  3. Ahmed Hafnaoui (TUN) – 7:37.00, 2023
  4. Sam Short (AUS) – 7:37.76, 2023
  5. Daniel Wiffen (IRL) – 7:38.19, 2024
  6. Sun Yang (CHN) – 7:38.57, 2011
  7. Grant Hackett (AUS) – 7:38.65, 2005
  8. Bobby Finke (USA) – 7:38.67, 2023
  9. Lukas Märtens (GER) – 7:39.10, 2025
  10. Ian Thorpe (AUS) – 7:39.16, 2001

He also now dethrones Irish Olympic champion Daniel Wiffen to rank #1 in the world this season and the only swimmer on the planet to have a sub-7:40 time thus far.

2024-2025 LCM Men 800 Free

Sven GER
Schwarz
05/02
ER 7:38.12
2Lukas
MÄRTENS
GER7:39.1004/15
3Florian
WELLBROCK
GER7:41.1004/15
4Daniel
Wiffen
IRL7:41.5204/13
5Oliver
KLEMET
GER7:44.6105/02
6Samuel
Short
AUS7:45.0203/08
7Kristóf
RASOVSZKY
HUN7:47.0404/13
8Kuzey
Tuncelli
TUR7:47.4603/07
9Dávid
BETLEHEM
HUN7:48.0204/13
10Alexander
Stepanov
RUS7:49.3604/15
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Than Nguyen
19 days ago

This is almost like Germany is back where they were in the 80’s and the 90’s, when Germany (or actually West and East Germany) last were a powerhouse in mid-distance/distance swimming. I vividly remember legends like Michael Gross, Uwe Dassler, Stefan Pfeiffer, Thomas Fahrner, Rainer Henkel and Jorg Hoffman (I probabaly forgot a few).

Than Nguyen
20 days ago

Crazy with 2 Tunisians among the all-time top 3… And if Ahmed Jaouadi continues to develop, then we could quite possibly have 3 among the top 4…

Than Nguyen
20 days ago

Can’t Swimswam please interview some German coaches or their national team director? I’d love to hear what Germany has done lately to have so many great distance/mid-distance swimmers from different club teams.

Hannover
Reply to  Than Nguyen
20 days ago

Only Sven Schwarz trains in Hannover, all the other ones are in Magdeburg under Bernd Berkhahn; Oliver Klemet didn’t change his club until now, but also trains in Magdeburg.

Than Nguyen
Reply to  Hannover
20 days ago

I would love to listen to an interview that picks Bernd Berkhahn’s brain.

Nora
20 days ago

Maertens needs someone like Short to push him to a better time. 3:51 is way slow for a 3:39 400 freestyler.

Thomas The Tank Engine
Reply to  Nora
20 days ago

Yeah, Short can act as a rabbit, he always attack the race from the start, that’s why I always enjoy his swims.

Swimmin in the South
20 days ago

After the way he swam the 400 Fr, he went out too slow.

Adrian
20 days ago

Martens interview on 400 free WR: just got back from altitude, no tapering, didn’t expect much of the time, but did want to get out fast, despite what his trainer was saying (Full interview: https://www.swimopenstockholm.se/post/lukas-m%C3%A4rtens-on-his-wr-race)

Tencor
20 days ago

Sources are saying the German swimming federation is demanding the addition of the 4×800 freestyle relay at the LA 2028 Olympics

Troyy
Reply to  Tencor
20 days ago

Just give them the gold and don’t bother swimming the relay.

none
Reply to  Tencor
20 days ago

China needs men’s 4×100 breaststroke, Russia needs men’s 4×100 backstroke, Germany needs 4×400 & 4×800 freestyle 😂😭😭

arrow
20 days ago

is there a vid?

About Retta Race

Former Masters swimmer and coach Loretta (Retta) thrives on a non-stop but productive schedule. Nowadays, that includes having earned her MBA while working full-time in IT while owning French 75 Boutique while also providing swimming insight for BBC.

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