American Bryan Clay secured the men's decathlon world title after two days of gruelling competition in wet and windy conditions in Helsinki on Wednesday.
The 25-year-old Olympic silver medallist won the first global medal of his career with a total of 8732 points - the best in the world this year.
Olympic champion Roman Sebrle of the Czech Republic took the silver medal, 211 points behind Clay.
Hungary's Attila Zsivockzy came through late to take bronze with 8385 points.
Zsivoczky's time of 4:32.17 in the final event - the 1500m - saw him overall both Russian Aleksandr Pogorelov and Estonia's Kristjan Rahnu.
Clay stamped his authority on the event from the opening 100m, which he won in 10.43 seconds.
The Texan steadily extended his lead with a mark of 7.54m in the long jump and a personal best of 16.25m in the shot put.
Sebrle, chasing an elusive first world title, overhauled Clay after he cleared 2.06m in the high jump.
But Clay clawed back a narrow 15-point lead over Sebrle at the end of day one, after powering to a personal best of 47.78 seconds in the 400m.
The US star then shrugged off the damp conditions in Helsinki on the second day of competition to push further ahead.
He clocked the fastest time over the 110m hurdles - 14.71 seconds - and threw 53.68m in the discus.
Sebrle saw his chance of gold slide in the pole vault where he could not match Clay's mark of 4.90m.
And after landing 72.00m in the javelin, Clay's lead over the Czech world record-holder stretched to 356 points, making the 1500m merely a formality.
Afterwards, Clay praised his opponents and set his sights firmly on claiming the world record.
"It was a great competition," he said.
"The reason I did so well was because I had so many good rivals. Everything went well.
"Roman had his problems and today was just my day.
"Breaking the world record has always been in the works. I just need the right conditions and I can make it."