Riyadh

The road to peace in Khartoum runs through Abu Dhabi, Riyadh and Cairo.

But the programs have struggled to get enough qualified participants, observers say, and have tended to focus their efforts on Riyadh rather than across the country.

Talks are ongoing over a potential three-fight deal under the Riyadh Season banner, meaning a comeback is likely to happen in Saudi Arabia.

In a speech in Riyadh, Trump said he wanted "commerce not chaos" in the Middle East, a region that "exports technology not terrorism".

Meanwhile, the Trump family is also leasing its brand to two new real estate projects in the Saudi Arabian Capital, Riyadh.