The Japanese boxer underwent a craniotomy.

Ginjro Shideoka underwent the operation after his split decision defeat to Pedro Taduran.

Moments after the decision was made official, Shigeoka collapsed in the ring and was carried out on a stretcher.

In July last year, Taduran knocked Ginjiro out in the ninth round and the Japanese fighter collapsed in the ring. After suffering a fractured orbital bone, Shigeoka was discharged from hospital and given the go-ahead for a rematch against Taduran.

The World Boxing Council and its president, Mauricio Sulaiman, wish him a speedy and full recovery.