South Africa number eight Duane Vermeulen doubtful for Rugby World Cup

South Africa number eight Duane Vermeulen has emerged as a doubt for the Rugby World Cup after it was confirmed that he needs neck surgery.

The 29-year-old is expected to miss the team's five warm-up matches ahead of the tournament.

Vermeulen was crowned South Africa's Rugby Player of the Year and Super Rugby Player of the Year in 2014.

"Duane will be put on an intensive post-operation rehabilitation programme and we will work tirelessly to get him ready for the World Cup," team doctor Craig Roberts is quoted as saying by Sky Sports News.

"Player welfare is very important which is why we made the decision for Duane to undergo surgery. It is the best medium and long-term career option."

Vermeulen, who will join Toulon next season, has won 29 caps for the Springboks.