US Open 2018 winner Naomi Osaka defeated world number seven Elina Svitolina in the Australian Open 2019 quarter-finals on Wednesday to win her 12th straight Grand Slam match. The 21-year-old world number four clinched the match 6-4, 6-1 in 72 minutes. In the semi-finals, Osaka will face the winner of the quarter-final match between Serena Williams and Karolína Plíšková.