The games were not back to back. There was a one hour break at 6pm for Seven News, which won its timeslot largely due to the strong lead-in from the Giants v Tigers game.
Channel 9 won the ratings last night in every timeslot on Sunday from 4pm - 11pm.
The 6-7pm Sunday News was won by Channel 9 - 1,522,000 vs Channel 7 1,451,000
The NRL was the stronger lead-in: 564,000 vs 366,000 for AFL.
For Channel 7 to have beaten the NRL in the 4pm - 6pm slots, its counterprogramming in NSW & QLD (Better Homes & Garden, 5pm News, Weekender) needed to have 198k viewers. None of them rated that highly at any point, so 9 won both hours, even without including 9's counterprogramming in SA, WA & VIC. Adding that only makes 9s win bigger.
I also noticed the reach for Sunday NRL's 2 hour slot was only 15,000 off the AFL's 3 hour slot. Basically, the NRL got as many channel changers flicking over in 2 hours as the AFL got in 3 hours.
For the record, Sunday Night AFL didn't just get beaten by MAFS. The order was, in terms of other channel programming:
MAFS 1,974,000
60 MINUTES 855,000
ABC NEWS 850,000
THE PIANO 620,000
THE 1% CLUB UK 496,000
AUSTRALIAN SURVIVOR 439,000 --> outrated Sunday Night AFL
AFL 437,000 -- so the AFL broadcast nationally (even on 7Mate in NSW, QLD) was beaten not only 10 & ABC as a program, but also by 7 itself with a rerun of a UK game show on its own channels in NSW & QLD
WHY PLANES CRASH 190,000
COLD CHISEL (Did not make the list - sub 190k)
So the evening timeslots comparing Channel 9 & 7:
7pm - 8pm slot Channel 9 was 1,974,000 vs 933,000 -- Channel 7 beaten by 1.041 million
8pm - 9pm slot Channel 9 was 1,974,000 vs 627,000 -- Channel 7 beaten by 1.347 million
9pm - 10pm slot Channel 9 was 855,000 vs less than 627,000 -- Channel 7 beaten by at least 230,000 - we don't know for sure because Cold Chisel didn't rate
However I am being generous here to 7, as the AFL in WA was up against Channel 7 news, ABC news, Channel 9 news and MAFS fully in the last 90 minutes WA -- so the margin win for Channel 9 would actually be larger in that state.
So basically, the Channel 7 didn't just lose to MAFS. The combined coverage of AFL and Why Planes Crash/Cold Chisel counterprogramming for the last part of the AFL broadcast was also beaten by several hundred thousand by Channel 9's 60 minutes alone, and by a decent margin.
It wouldn't surprise me to see in Perth that the ABC 7 News & The Piano also beat the AFL ratings. My honest guess is that between 7-7:30pm and 8:00-8:30pm, in the 15 minute spot ratings nationally, Channel 7 was beaten by ABC and came third behind Channel 9 & the ABC.