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! style="width:60px;"|Rang.<ref name="atp">[[ATP's verdensrangliste]] pr. [[13. januar]] [[2020]].</ref>
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| style="text-align:left; padding-left:5px; padding-right:20px;"|{{flagikon|JPN|3:2}} [[Kei Nishikori]]
| style="text-align:left; padding-left:5px; padding-right:20px;"|[[Albue]]skade<ref>[https://www.tennis.com/pro-game/2019/12/kei-nishikori-andy-murray-australian-open-withdrawal-lucas-pouille/86528/ Tennis.com - ''Kei Nishikori to miss Australian Open due to ongoing elbow injury'' (30. december 2019)] {{en sprog}}</ref>
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| style="text-align:left; padding-left:5px; padding-right:20px;"|{{flagikon|AUS|3:2}} [[Alex de Minaur]]
| style="text-align:left; padding-left:5px; padding-right:20px;"|[[Mave]]skade<ref>[https://www.atptour.com/en/news/de-minaur-australian-open-2020-withdrawal ATP Tour - ''De Minaur Withdraws From Australian Open'' (16. januar 2020)] {{en sprog}}</ref>
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| style="text-align:left; padding-left:5px; padding-right:20px;"|{{flagikon|FRA|3:2}} [[Lucas Pouille]]
| style="text-align:left; padding-left:5px; padding-right:20px;"|[[Albue]]skade<ref>[https://www.tennisworldusa.org/tennis/news/ATP_Tennis/81948/lucas-pouille-to-miss-atp-cup-australian-open-/ Tennis World - ''Lucas Pouille to miss ATP Cup, Australian Open'' (25. december 2019)] {{en sprog}}</ref>
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