How many times have no. 1 & no. 2 featured in same Aus Open final?

This is the 12th time in the Open Era that number one and number two seeds have met in Australian Open men's singles final (Jannik Sinner and Alexander Zverev in 2025 Australian Open). In previous 11 finals between top 2 seeds in the Open Era, number one seeds won on seven occasions and number two seeds won on four occasions.