Ukrainian teen Elina Svitolina challenged German Mona Barthel early, but couldn't win their first round match. Picture: Getty Images

Ukrainian teen Elina Svitolina challenged German Mona Barthel early, but couldn’t win their first round match. Picture: Getty Images

Ukrainian teen Elina Svitolina challenged German Mona Barthel early, but couldn’t win their first round match. Picture: Getty Images