After the postponement of the World Athletics Championships last year, the rescheduled competition gets under way this week, in the United States for the first time.
Here is all you need to know about what is going to unfold when the action starts in Eugene, Oregon.
When are the World Athletics Championships?
The eighteenth edition of the World Athletics Championships will start with the opening ceremony on Friday 15th July, with the closing ceremony on Sunday 24th July.
Where will the World Athletics Championships take place?
This year's event takes place in Eugene, Oregon in the United States. It's the first time the US will have hosted the World Championships, but not the first in North America.
Edmonton in Canada was the first to secure that honour after they hosted the competition back in 2001.
With a capacity of 30,000 spectators, the newly-renovated University of Oregon Hayward Field in Eugene will host the track and field events.
Who else submitted a bid to host the World Athletics Championships?
In what was dubbed an "unusual move" by Runner's World, Eugene was selected to host the World Championships without a traditional bidding process.
Announced in Beijing on 16th April 2015, Eugene was selected after missing out on the previous competition in 2019.
This is not the first time the World Championship hosts have been decided in this way, as the same happened back in 2007 when Osaka, Japan was awarded the event.
Where were the last World Athletics Championships?
The last event was held in 2019 in Doha, Qatar at the Khalifa International Stadium. It was the first time in the competition's history that the World Championships had ever taken place in the Middle East.
Which nations will compete at the World Athletics Championships?
1,972 athletes are expected to compete from the 192 member foundations for the World Championships.
There will be no athletes from Russia or Belarus taking part in the competition this year.
Who topped the medal table in 2019?
In no great surprise from a country that has dominated the World Championships for so long, it was the US who topped the medal charts with 14 golds, 11 silver and four bronze for a total of 11.
Kenya came a distant second with five golds, two silver and four bronze, while Jamaica and China both earned three golds each.
Great Britain finished down in sixth in the medal standings with two golds and three silvers.
Who is likely to star at the World Athletics Championships?
After missing out on featuring as an individual, the American star Allyson Felix will feature in the mixed relay team.
With plans to retire after this season, the 18-time world championship medalist, who is also the most decorated American track and field athlete in history, will be hoping to go out on a high in front of a passionate home crowd in Eugene.
From a British perspective there will be plenty of interest in sprinter Dina Asher-Smith as the 26-year-old Londoner heads to Oregon looking to defend her world title in the 200m.
Asher-Smith also finished second in the 100m in Doha three years ago behind the Jamaican star Shelly-Ann Fraser-Pryce.
Asher-Smith and Fraser-Pryce look set to be on a collision course once again and will battle it out to see who is the quickest on the planet again this month.
Looking to other events, Norway's Karsten Warholm will be hoping to add to his list of titles.
The 400m hurdler holds the world record in the event and is the first person in history to run under 46 seconds.
Will the 26-year-old break his own world record for a second time in his impressive career so far?
In the field events, another Scandinavian could make more headlines with Sweden's Armand Duplantis hoping to claim the men's pole vault title.
Meanwhile, Indian sensation Neerja Chopra will hope to build on his Olympic success in Tokyo when he heads to the States.
Chopra became the first Indian athlete to win an Olympic track and field gold with his efforts in Japan and he will be determined to land another gold in the javelin this month.
A new personal best set in June, suggests the 24-year-old Chopra is in hot form coming into the World Championships.
Will the World Athletics Championships be televised?
Yes. BBC Sport will be covering the events in the UK, while the television rights belong to NBC Sports in the US.
Where can I see a full schedule of events?
A detailed timetable for the World Championships can be found at worldatheltics.org.
