Naomi Osaka has learned to appreciate her victories more after enduring the "toughest" year of her fledging career and the Japanese world No. 3 says mentally she is in a better place to launch her Australian Open title defense.
Osaka started 2019 by winning her second straight Grand Slam title in Melbourne following her success at the 2018 U.S. Open but suffered early exits at Roland Garros and Wimbledon.
The 22-year-old also lost her top ranking before disappointing in her U.S. Open title defense.