Kirui, a two-time world champion, clocked a time of 2 hours 11min 23sec to deny Chumba a second successive crown in the Windy City.

Despite being the slowest winning time in the last 23 years, it was enough to earn the 34-year-old his first marathon title since the 2011 International Association of Athletics Federations (IAAF) World Championships. 

"It's my first time to win on American soil, so I'm very excited," said Kirui, who won Olympic silver at London 2012. 

Chumba took the runners-up spot in 2:11:26, while fellow Kenyan Gideon Kipketer came third in 2:12:20.

Kenya also monopolised the top three positions in the women’s race at the World Marathon Major as Florence Kiplagat successfully retained her title with a time of 2:21:32, more than two minutes faster than her 2:23:33 from 2015.

The 29-year-old has thus become the first female to win consecutive Chicago Marathon titles since Ethiopia’s Berhane Adere triumphed in 2006 and 2007.

"When I was coming here, I was determined to win two years in a row," said Kiplagat. 

"I just wanted to win twice and enter the book of records two times."

Edna Kiplagat crossed the line second in 2:23:28, with Valentine Kipketer third in 2:23:41.

Switzerland’s Marcel Hug was adjudged the winner of the men’s wheelchair race after edging out reigning champion Kurt Fearnley of Australia in a photo finish.

The United States’ Josh George joined them on the podium after finishing two seconds shy of Hug’s 1:32:57.

The women’s wheelchair race was won by home favourite Tatyana McFadden in 1:42:28, securing her sixth successive Chicago Marathon crown.

Switzerland’s Manuela Schaer finished second in 1:42:29, while the US’s Amanda McGrory was third in 1:47:55,

According to marathon officials, there were more than 40,000 people from over 100 countries participating in this year’s marathon.