South Africa fast bowler Dale Steyn has announced his retirement from red-ball cricket with immediate effect.
Steyn, who will continue to make himself available for one-day and T20 internationals, said he had taken the decision in the best interests of his career.
The 36-year-old said: "It's terrible to consider never playing another Test again but what's more terrifying is the thought of never playing again at all.
"So I will be focusing on ODIs and T20s for the rest of my career to maximise my full potential and ensure my longevity in this sport."
Steyn played 93 Test matches for South Africa and is his country's leading Test wicket-taker with 439.
Cricket South Africa chief executive Thabang Moroe said: "Dale is undoubtedly one of the all-time greats of cricket.
"We are saddened to hear of his decision but it is one the management has to accept and we thank him for his significant contribution to the sport and to the nation."
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