Nick Kyrgios believes tennis needs a shake-up, and he’s proposed some drastic new ideas to overhaul the game. The former Wimbledon finalist has long believed the sport needs to appeal to younger fans. Earlier this year, he claimed tennis had become “mundane.”

The Australian is among twelve players to put their names on the PTPA’s lawsuit, including Sorana Cirstea, Reilly Opelka, and Vasek Pospisil