The 2024 rivals held talks with International Olympic Committee vice-presidents ahead of presenting their bids to international federations in Aarhus on Tuesday.
Over 2000 international delegates will attend the SportAccord convention at the city's Scandinavian Centre, reports broadcaster DR.
“Decision makers from across the international sports world are coming to Aarhus. We've never had anything like this in Aarhus before,” Visit Aarhus director Peer Kristensen told DR.
Aarhus will be host to “the most exciting conference in the city's history,” Kristensen said.
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A talking point at the convention will be the IOC's review into the Games designation process which could see both the 2024 and 2028 Olympics awarded at the same crunch vote in Lima in September.
The IOC is exploring the option in order to capitalise on the Paris and Los Angeles bids at a time when fewer and fewer cities are willing to take on the financial and logistical responsibilities of staging an Olympic Games.
Both Paris and Los Angeles emphasis they are focussed on 2024, whilst at the same time offering support to the IOC's review.
The Los Angeles delegation, led by Mayor Eric Garcetti, commented: "We remain committed to bidding for the 2024 Games and look forward to future discussions with the IOC Working Group as the bid progresses."
His Paris counterpart, Anne Hidalgo, said: "Paris lends its support to the IOC to review the designation process for candidate cities."
The IOC review is "interesting and legitimate," she added. "We are going to accompany the IOC in this process."
On Tuesday both cities will present their bids to international federations assembled in Aarhus for the 15th SportAccord convention.
Previous host cities include London, Berlin, Beijing and Madrid.
“This is really a world event… major media from all over the world will be closely following the decisions that the delegates will be taking. We will show that big congresses can easily be located in Aarhus,” Kristensen said.
Visit Aarhus has placed welcome committees in both Billund and Aarhus Tirstrup airports, reports DR.