Durezza is the third winner from as many runners out of the Australian-bred More Than Sacred (More Than Ready), who raced in New Zealand, winning the Gr.1 New Zealand Oaks over 2400 metres and finishing third in the Gr.1 Auckland Cup over 3200 metres. She has had six foals in Japan.

Second dam Danalaga (Danehill) won three races and was placed in three Listed events. She has bred six winners from seven runners, with winners in Australia and Singapore, and her best is Sacred Empire (More Than Ready), a full-sister to More Than Sacred and dual stakes winner in Malaysia.

Third dam Tamarino (Caerleon) was placed once and produced seven winners. She is a half-sister to Northern Spur (Sadler's Wells), a dual Grade 1 winner in the US who took the Grade 1 Breeders' Cup Turf and became a sire.

More Than Sacred has the unraced 2-year-old filly Divinest (Real Steel) and a yearling filly by Rey de Oro.