Naomi Osaka crushes virus-hit Lesia Tsurenko to reach US Open semi-finals

• Osaka wins quarter-final 6-1, 6-1 in under an hour • Tsurenko 'woke up with a viral illness' on morning of the match What Naomi Osaka did to a virus-stricken Lesia Tsurenko in under an hour in the Arthur Ashe stadium on Wednesday sent a chill through a tournament that is suffering serial heat-stroke. Even allowing for the Ukrainian's illness, which nearly forced her to pull out on the morning of the match, the 20-year-old Japanese player with the American accent confirmed all the expectati...