Ben Shelton, Taylor Fritz and Madison Keys all kicked off their 2026 Australian Open runs with victories on Tuesday.
Players at this month's Australian Open will be competing for a record prize pool with organisers on Tuesday announcing a 16 percent increase in the total purse to Aus$111.5 million (US$75 million).
Madison Keys in 2025 was the latest in a string of upset winners at the Australian Open, but who were the biggest surprises?