IAAF deputy general secretary Nick Davies steps down over leaked email

• Davies discussed plan to delay naming of Russians who failed doping tests
• Sebastian Coe’s closest aide facing investigation by IAAF ethics commissionSebastian Coe’s closest aide, Nick Davies, has dramatically stood down from his role as deputy general secretary of the IAAF pending a review into his behaviour after he was accused of covering up Russian doping allegations.Davies, who ran Coe’s office in Monaco, has also referred himself to scrutiny from the Internat