Nadal and Wawrinka into ATP World Tour semis

Updated 2236 GMT (0636 HKT) November 8, 2013
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Rafael Nadal shows his delight after completing a three set win over Tomas Berdych to wrap up Group A at the ATP World Tour Finals Carl Cort/AFP/Getty
Czech star Berdych at full stretch during his three set defeat to Rafael Nadal at the ATP World Tour Finals. Carl Court/AFP/Getty
Stanislas Wawrinka secured his second win at the ATP World Tour Finals with a three set victory over David Ferrer and combined with Nadal's win over Berdych saw the Swiss star into the last four. Glyn Kirk/Getty Images