New Zealand cricket team in Australia in 2019–20

[10] Ahead of the fourth day of the second Test match, Australia's Peter Siddle announced his retirement from international cricket.

[21][22] Peter Siddle was added to Australia's squad ahead of the second Test after Josh Hazlewood was ruled out due to a hamstring strain.

[27] Kyle Jamieson was added to New Zealand's squad ahead of the second Test after Lockie Ferguson was ruled out due to a calf strain.

[31] Ahead of the third Test, Glenn Phillips was added to New Zealand's squad, as cover for Kane Williamson and Henry Nicholls who were suffering with flu-like symptoms.

[32] Ahead of the first ODI, Sean Abbott was added to Australia's squad, as cover for Kane Richardson who reported symptoms of COVID-19.