Russian President Vladimir Putin has ordered an inquiry into allegations of major drug abuse in athletics that have left the country facing international isolation. Moscow is scrambling to respond to the bombshell World Anti-Doping Agency (WADA) report, which outlined systematic doping in Russian athletics. It has even declared that a foreign specialist could take over its discredited testing laboratory.The athletics world governing body has given Russia until Friday to come up with answers to the allegations. With the deadline looming, Putin met sports chiefs in Sochi, the Black Sea home of the 2014 Winter Olympics.The stakes could not be higher for Russia, which risks being excluded from the 2016 Summer Olympics in Rio over damning allegations of corruption and state-sponsored doping.