Reigning KSW welterweight champion Roberto Soldic was gearing up for a title defense against celebrated Czech fighter Patrik Kincl at this weekend’s KSW 50 in London, but a torn ligament to Kincl’s arm has ruled him out of the championship showdown.

KSW confirmed to MMA Fighting that Kincl has withdrawn from the contest due to the injury and is set to be replaced by promotional newcomer Michal Pietrzak. Instead of a welterweight title defense, the bout will be contested at an 80-kilo (176.5 pounds) catchweight.

Soldic (16-3-0) is considered one of the standout talents outside of the UFC and Bellator. After winning the KSW title welterweight title with a stoppage victory over Borys Mankowski in his promotional debut, Soldic parted ways with the strap when he was defeated by South African Dricus Du Plessis.

“Robocop” reclaimed the title in his next outing when he stopped Du Plessis in the third round of their rematch at KSW 45 in London. Since then, the Croatian fighter has won two fights in a row, stopping Vinicius Bohrer in the first round of their catchweight clash and most recently defended his title against Polish prospect Krystian Kaszubowski with a first-round knockout.

Pietrzak (8-3-0) usually plies his trade as a middleweight and carries a three-fight win streak into his short notice KSW debut in London. In his most recent outing, he scored a decision win over Adrian Błeszynski on the main card of Babilon MMA 8 in late May.

Check out the Eurobash preview for KSW 50 featuring KSW heavyweight champion Phil De Fries.