As the first major tennis tournament of the year, the Australian Open sets the tone for the rest of the year. From a fashion standpoint, however, the Australian Open also marks a special time. At the Australian Open this year, some of the biggest stars are serving aces on the court and serving fabulous outfits. Alexander ZverevIn a year when fluorescent outfits dominated the Australian Open, Alexander Zverev opted to do the exact opposite. However, it’s the showstopping butterfly-adorned hat and umbrella that Osaka’s look at the 2026 Australian Open will go down in history.