SEN Fanatic will broadcast the 1pm AEST match (Richmond v Brisbane) in full, before joining St Kilda v GWS in progress at 4pm AEST. SEN Fanatic is the only station on the SEN network where you can hear Tigers v Lions live, it is not even heard on SEN stations in Queensland. SENTrack in regional Victoria will take St Kilda v GWS in full.
Triple M Brisbane will broadcast Tigers v Lions on DAB+ while Triple M in Sydney (DAB+), Melbourne, Adelaide and Perth will get Saints v Giants.
ABC AFL Extra and News Radio in ACT and NSW will have full commentary of Saints v Giants from 3pm AEST. Other stations will join at 4.05pm AEST following Tigers v Lions.
Both matches of course can be heard in full on the AFL website and app.