Groth teed off in the Port Phillip Open Amateur at Kingston Heath on Thursday, one of the most prestigious in Australian amateur golf and a qualifying event for the Victorian Amateur next week. With 151 men and 24 women playing, it’s the strongest field at any amateur tournament in 2020, and with that in mind, Groth is tempering his own expectations. “I always played a round or two a year of golf when I was playing tennis. Right before I retired I joined Commonwealth (golf club), and when I started my handicap was 20,” Groth said on Thursday before he teed off. Groth recorded the fastest ever serve in men’s tennis, a 263km/h thunderbolt, and is known for his booming drives.