Caroline Wozniacki, former World No 1 and a Grand Slam champion, celebrates her 30th birthday on July 11, 2020 (Saturday). She beat Simona Halep to win 2018 Australian Open and become the first player from Denmark to win a tennis major. It was also her maiden Grand Slam win. Wozniacki is also a former World No 1 and reached the top ranking in three different periods. She retired in January 2020