Competition starts with qualifying rounds and semi-finals in four of the men's freestyle weight divisions tomorrow, with these finals scheduled for Sunday (October 3).

Georgia's Beka Lomtadze is looking to defend his world title in the 61-kilogram category, but faces a challenge from European champion Arsen Haruyunyan of Armenia and Iran's exciting prospect Rahman Amouzadkhalili.

The 74kg division includes Olympic bronze medallist and two-time 79kg world champion Kyle Dake of the United States, although the line-up looks a strong one, including the reigning under-23 world champion Razambek Zhamalov as he makes his return from injury representing the Russian Wrestling Federation (RWF).

Three other Olympians are also competing in this event.

The 86kg and 125kg categories look likely to be the most fiercely contested on the first day, both including three athletes who finished on the podium at Tokyo 2020.

Two-time world champion David Morris Taylor III of the United States triumphed in the 86kg in the Japanese capital, but Iranian Hassan Yazdani will look to defend his title at this event in Oslo and gain revenge for his dramatic late defeat to Taylor in the gold medal bout at Makuhari Messe.

The bronze medallist at the Olympics in Artur Naifonov of the RWF will also be involved.

The 125kg includes defending champion Geno Petriashvili of Georgia, who is looking to bounce back from a defeat in the final at Tokyo 2020 to American Gable Steveson.

Steveson is not included among the field in Oslo, but bronze medallists Amir Hossein Zare of Iran and Taha Akgül of Turkey are.

Four men's freestyle events start on Sunday.

In the 57kg, Thomas Gilman of the US is the only Tokyo 2020 medallist having clinched bronze, and he will hope to build on that by securing his maiden world title, although Turkey's Suleyman Atli may have something to say about that after a disappointing defeat to Iran's Reza Atri at the Olympics.

The 65kg looks a particularly wide-open event, with European champion Zagir Shakiev of the RWF, 2020 individual World Cup winner Vazgen Tevanyan from Armenia and several promising youngsters involved.

In two non-Olympic weight divisions, American pair Jordan Burroughs and J'den Cox are likely to lead the 79kg and 92kg respectively.

Those four finals take place on Monday (October 4), with the final two men's freestyle events also getting underway that day.

Magomedmurad Gadzhiev representing Poland, American James Gren and European champion Israil Kasumov of the RWF should be in contention in the non-Olympic 70kg, while the 97kg looks to draw plenty of headlines.

The RWF's Abdulrashid Sadulaev won a second Olympic medal at Tokyo 2020 and is bidding for a fifth consecutive gold at the UWW World Championships.

Olympic silver medallist Kyle Snyder of the US and Italian bronze medallist Abraham De Jesus Conyedo Ruano seem "The Russian Tank's" most likely challengers.

The women's wrestling competitions also commence on Monday, with the 55kg field much changed after reigning champion Jacarra Winchester lost to compatriot Jenna Burkert in the US trials.

The 62kg defending champion Aisuluu Tynybekova of Kyrgyzstan will hope to retain her title, with Olympic gold medallist Yukako Kawai of Japan absent.

The women's wrestling events take centre stage on Tuesday (October 5) and Wednesday (October 6).

On Tuesday, the Olympic bronze medallist Sarah Hilderbrandt of the US starts her 50kg campaign, while Mongolia's Bolortuya Bat Ochir enters the 53kg having won the same medal in that event at Tokyo 2020.

The 65kg does not feature a medallist from this summer's Games, but Belarus' Rio 2016 runner-up Maria Mamashuk is involved in a line-up that features youthful and experienced competitors.

Five-time world champion Adeline Maria Gray of the US looks a strong contender in the 76kg division having claimed silver in the Japanese capital, although Rio 2016 gold medallist Erica Wiebe of Canada could provide a threat.

American Tamyra Mensah Stock is the only women's wrestling Olympic champion who has entered in Oslo, and starts the defence of her 68kg world title on Wednesday.

Nigeria's Blessing Oborududu, who lost to Mensah Stock in the gold medal bout in Tokyo, and Meerim Zhumanazarova of Kyrgyzstan ensure three of the podium athletes at the Olympics will be present in Oslo.

The 57kg features the two Olympic bronze medallists in American Helen Louise Maroulis, seeking her third world title and first since 2017, and Bulgaria's Evelina Georgieva Nikolova.

The non-Olympic weights of 59kg and 72kg look to be headlined by European champion Anastasia Nichita of Moldova in the former and Japan's bronze medallist at the Nur-Sultan 2019 World Championships Masako Furuchi in the latter.

The 10 Greco-Roman events are last to get underway running from Thursday (October 7) to the final day of competition on Sunday (October 10).

Iran's Mohammadreza Abdolhamid Geraei is the only Olympic champion from the Greco-Roman discipline to feature at Oslo, taking part in the 67kg.

Iakobi Kajaia of Georgia, the Tokyo 2020 silver medallist, looks the favourite in the 130kg.

Three bronze medallists from the Olympics are involved in Oslo in Azerbaijan's Rafig Huseynov in the 82kg, Zurabi Datunashvili of Serbia in the 87kg and Iranian Mohammadhadi Abdollah Saravi in the 97kg.

Greco-Roman competitions will also be held in the 60kg and 77kg, as well as the non-Olympic weight divisions of 55kg, 63kg and 72kg.