Tyson Anger and Oleksandr Usyk have signed words for an undisputed heavyweight championship struggle in Saudi Arabia, a couple of assets informed ESPN on Friday.

The struggle may just whip park on Dec. 23 or someday in January, assets mentioned. First, Anger should take care of trade when he meets former UFC champion Francis Ngannou on Oct. 28 in Saudi Arabia on ESPN+ PPV.

Anger-Usyk will crown boxing’s first undisputed heavyweight champion within the four-belt year and is a unprecedented assembly between heavyweights identified as two of the most efficient pound-for-pound on the planet.

Anger and Usyk have been in talks to struggle this day April at London’s Wembley Stadium ahead of negotiations collapsed on the eleventh day.