This Spanish surprise had Venus squandering a match point in the 10th game of the final set before losing 2-6, 6-3, 7-5 at Rod Laver Arena.
Suarez Navarro, a French Open quarterfinalist last year, is making her tournament debut, while Williams suffered her second- earliest exit in 10 appearances.
In other AO news,
Serena Williams produced a characteristic fightback to advance to the third round after a 6-3 7-5 victory over Argentina’s Gisela Dulko in 110 minutes.
Also, Jelena Dokic of Austrialia defeated Russian Anna Chakvetadze 6-4, 6-7, 6-3 on Night 3 while Serbian Ana Ivanovic rallied past Italian Alberta Brianti 6-3, 6-2.
Also through to the third round are Jelena Jankovic, Elena Dementieva, Amelie Mauresmo and Jie Zheng.
AO Results Women’s Singles