Parker is best remembered for winning the 1913 Australasian Championships men's singles title.

The following night he defended his Australasian Championship against Al Snow.

The left-hander won the Men's Singles title at the 1907 Australasian Championships.

Australasian Championships in tennis commenced in 1905, later becoming the Australian Open.

He also won the depleted Australasian Championships in 1912.

Also he won both these events at the Australasian Championships in 1897 and 1899.

In 1911, Hardwick won the 220yd, 440yd and 880yd freestyle at the Australasian Championships.

It was the last tournament to be called "Australasian Championships".

He was the champion at both the Australasian Championships and Wimbledon multiple times.

The Australian Open was first played in 1905 as The Australasian Championships.