Stormers winger Leolin Zas injured his knee during training on Wednesday ahead of the URC quarer-final against Cardiff.

The Stormers could be sweating over the fitness of one of their most prolific wings ahead of the United Rugby Championship (URC) quarter-final against Cardiff in Cape Town, after Leolin Zas suffered a worrying knee knock at training on Wednesday.

During a wet and slippery session at the DHL Stadium in preparation for the knockout clash on Saturday afternoon (3.30pm kick-off), Zas had a coming together with Damian Willemse after the fullback slipped while trying to cover a kick through.

They collided, with Zas tumbling over Willemse and coming off second best, taking a knock to his already strapped right knee. Both players, crucial to the Stormers’ play-off ambitions, received brief treatment from team staff before continuing.

Willemse completed the session after initially appearing to have come off worse, but Zas was forced to cut his training short. He later had his knee heavily strapped with an ice pack and was seen hobbling through the tunnel after training. The injury appeared serious, but it seems he will be fit to play in Saturday afternoon’s clash.