In January 2020, tropopause-level ozone was the highest ever observed in the available data record from the Microwave Limb Sounder since 2004 in the austral mid-latitudes. Two extreme events preceded this anomaly: the Australian Black Summer fires and the 2019 sudden stratospheric warming (SSW), raising the question of how these disruptions influenced Southern Hemisphere ozone. Here, we investigate the dynamical and chemical contributions to the ozone anomaly using a chemistry-climate model and satellite observations. We find that downward transport of polar ozone-enriched air from the SSW later spread equatorward. This combined with photochemical ozone production from emissions of wildfires (fueled by dry and hot conditions previously attributed to the SSW), enhancing tropopause-level ozone by up to 30 ppb from climatology, with the dominant factor being the transport effect. While chemical ozone production in wildfire smoke is well-recognized, our results highlight that SSWs can greatly influence mid-latitude ozone through dynamical effects.