Former North Melbourne premiership player David King believes three sides have separated themselves from the travelling pack following the conclusion of round seven.

It's no surprise which sides King has gone for while looking at the ladder, with Geelong, Collingwood and GWS King's preferred trio, and all currently in the top three.

The Cats are the only team at 6-1, while both the Pies and Giants boast a 5-2 record, with only Brisbane joining them on 20 points.

โ€œI think this is the closest year weโ€™ve had for some time. At Round 8, all we probably know is what divisions theyโ€™re falling into,โ€ King told SENโ€™s Whateley.

โ€œToday weโ€™ve sort of said, as the ladder reads, Geelong, Collingwood and GWS are a fair way in front of the next group.

โ€œWhat the next group is, I donโ€™t think itโ€™s that deep. I think itโ€™s becoming really obvious that thereโ€™s not a great deal of quality this year.

โ€œWe donโ€™t have six sides, eight sides, that can win the flag this year in my opinion. I think itโ€™s a race in three and theyโ€™re a fair way in front.โ€