Lions flanker Jaco Kriel has been ruled out of South Africa's November tour after picking up an injury while playing club rugby in Japan.
The Lions revealed the news via a statement on Thursday, saying Kriel sustained a grade two tear of his left MCL at the weekend.
He has returned to Johannesburg for treatment and will be out of action for approximately four weeks, which rules him out of the end-of-year tour.
The injury is a massive setback for Bok coach Allister Coetzee, who is already without the services of regular number six Francois Louw who has also been ruled out for the rest of the year.
It leaves Coetzee with few options at openside flank since Marcell Coetzee, who has moved to Ulster, is still recovering from a serious knee injury.