IAAF’s Sergei Bubka faces investigation on payment to disgraced Balakhnichev

• $45,000 paid to Monaco firm a day after same amount paid to Diack company• Newly formed Athletics Integrity Unit investigating 2009 paymentA payment made by Sergey Bubka, the senior vice-president of athletics’ world governing body, to a now disgraced senior figure is to be investigated by the independent Athletics Integrity Unit, the Guardian can reveal.Bubka, who is also an executive board member of the International Olympic Committee and an Olympic gold medallist, was report