Cause of Elena Rybakina skipping Seoul surfaces after latest mysterious withdrawal

Elena Rybakina may have had another mysterious withdrawal but this time there is an official cause listed as it is stated on the WTA website that the Kazakh tennis star pulled out of Seoul due to a back injury.After missing some time due to acute bronchitis and returning to action in Cincinnati, the 25-year-old stunningly fired her long-time coach Stefano Vukov just before the start of the US Open. A few days later, the world No. 4 started with a win over Destanee Aiava at Flushing Meadows but w