BOSTON (CBS/AP) – Two new world bests were set in the wheelchair division of the 2017 Boston Marathon Monday.

Check: Top Finishers

READ MORE: 2 Massachusetts Men Killed In Fiery Las Vegas Crash

In a thrilling men’s race, Marcel Hug of Switzerland edged out Ernst van Dyk of South Africa by one second at the finish line.

“It was really crazy,” Hug told WBZ-TV’s David Wade. “It was a really nice race, a lot of tailwind, so it was really fast. In the end, I was happy to work together with Ernst … I’m really happy to have a good finish.”

Marcel Hug edged out Ernst van Dyk at the finish line., setting a new world record. (WBZ-TV)

Hug defended his title with a new world best time of 1:18:03.

The winners’ times are considered a world best and not a world record. The straight-line Boston course doesn’t qualify for world records because of the possibility of a supportive tailwind like the one on Monday.

The old course record was 1:18:25, set at the 2012 Boston Marathon, by Joshua Cassidy of Canada.

Van Dyk, who also had his best-ever finish in the race, told Wade of his respect for Hug.

“You know, Marcel is one of the best runners in the world,” said van Dyk. “When it comes to the end of the race, I’ve known him since we trained together before the paralympics in 2000, I think? I’ve known him since he was a young kid and I’ve seen him develop as a racer and I’m just so happy he could take that record back today.”

Manuela Schar set a new world record in the women’s wheelchair race. (WBZ-TV)

Manuela Schar of Switzerland won the women’s race in 1:28:17, shattering the previous course record by 5 minutes and 49 seconds, set in the 2011 Boston Marathon by Wakako Tsuchida of Japan.

READ MORE: Annissa Essaibi George: Any Suggestions Of Ties To Donald Trump Are 'Gross Statement'

“What a crazy day, I can’t believe it,” said Schar. “So far, it was the perfect day.”

Watch: Schar’s World Best Finish

She said she didn’t know about her world best until after she crossed the finish line.

“I didn’t even think about it when I was on the road,” she said. “I just wanted to go as fast as I could, I can’t believe it was enough.”

Watch: Schar: ‘It Was The Perfect Day’

Schar and Hug each earned $20,000 for the win and $7,500 for the new course records.

Defending women’s champion Tatyana McFadden finished fourth, two weeks after having surgery.

“Two weeks ago, I was in the hospital, and today I just really wanted to get back on it,” she told WBZ-TV’s David Wade. “This was a really good start, especially after being in the hospital, so it can only go up from here.”

Watch: Tatyana McFadden Interview

MORE NEWS: Westboro Wrong-Way Crash Leaves Multiple People With Serious Injuries

(© Copyright 2017 CBS Broadcasting Inc. All Rights Reserved. The Associated Press contributed to this report.)