[1] Morrison was born in 1936 at Tikitere, a small farming community between Lake Rotoiti and Rotorua in New Zealand's North Island.

Morrison, aged 8 years old, wanted to play on the courts but as she was so young her father made her a wooden bat and coached her while she practised on the walls of their house instead.

Pratt invited Morrison, along with the Wimbledon champions Althea Gibson and Maria Bueno, to the Caribbean the following year for international tennis tournaments at Montego Bay, Jamaica, and San Juan, Puerto Rico.

She won the Guildford Championships by beating South Africa’s Joan Cross, and the mixed doubles with Mexican Gustavo Palafox as her partner.

[1] When Morrison retired from international tennis she donated her remaining winnings to the charitabe foundation which Waititi had founded to support Māori achievers.

[3] In the 1960 New Year Honours, Morrison was appointed a Member of the Order of the British Empire for services in the field of sport, especially tennis.

[6] In the 2021 Queen's Birthday Honours, Morrison was appointed a Dame Companion of the New Zealand Order of Merit, for services to tennis.