Aryna Sabalenka fought back to defeat Czech 20-year-old Nikola Bartunkova in the Berlin Open quarter-finals on Friday. The world number one prevailed 2-6, 7-6 (7-2), 6-4 in hot conditions at the Wimbledon grass warm-up.
Source: [Yahoo Sports](https://sports.yahoo.com/articles/sabalenka-given-fright-bartunkova-berlin-172640938.html)