He blamed the result of the drug test on an anaesthetic injection he had during dental treatment.

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Then an injection of pace from Arshavin saw him test Hennessey with a stinging shot.

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Nel will be replaced by Dale Steyn or Makhaya Ntini, who has had a cortisone injection in his knee and faces a test to decide if he can rejoin the tour.

BBC: SPORT | Cricket | Nel faces lengthy injury lay-off