A "witch doctor" from Ghana claims that he is responsible for the knee injury that may limit Portugal captain Cristiano Ronaldo at the 2014 FIFA World Cup.

Nana Kwaku Bonsam, a Ghanaian witch doctor, told a radio station in his home country that he used his “powers” to injure Ronaldo’s leg. The Real Madrid star’s bout of knee tendinitis may keep him out of Portugal’s Group G opener against Germany on June 16.

“I know what Cristiano Ronaldo’s injury is about, I’m working on him,” Bonsam told Angel FM in Kumasi, Ghana, according to a translation by the Guardian. “I am very serious about it. Last week, I went around looking for four dogs and I got them to be used in manufacturing a special spirit called Kahwiri Kapam.”

“I said four months ago that I will work on Cristiano Ronaldo seriously and rule him out for the World Cup or at least prevent him from playing against Ghana, and the best thing I can do is to keep him out through injury,” he added. “This injury can never be cured by any medic, they can never see what is causing the injury because it is spiritual. Today, it is his knee, tomorrow it is his thigh, next day it is something else.”

On Tuesday, the Portuguese Football Federation revealed that Ronaldo was suffering from left-leg patellar tendinitis, or “jumper’s knee,” in addition to his existing thigh injury. The knee injury casts doubts over whether he’ll be ready to participate in the World Cup opener, as well as how effective he’ll be if he’s able to return.

Nani, Ronaldo’s teammate on Portugal’s national team, remains optimistic about the prolific goal scorer’s playing status. “We hope that Cristiano is in good enough shape to play—and to help the team,” he told FIFA.com. “If for some reason he is not there, whoever is there playing has to be confident in their ability to get the job done. The World Cup is a one-of-a-kind challenge. I want to be fully fit, and in top form along with my teammates.”

Ronaldo remains “relaxed” about his injury situation, Nani added. Portugal is slated to play Ghana in its final Group G matchup on June 28.

[h/t The Big Lead]