Former Richmond and Western Bulldogs coach Terry Wallace believes only four teams can win the 2018 premiership.

Wallace doesn't think either of the Sydney teams can win, and he's also put a line through the Hawks, despite Alastair Clarkson's men earning a double chance.

โ€œIโ€™ve got three that canโ€™t win at this stage,โ€ Wallace toldย SEN Afternoons.

โ€œI donโ€™t think Hawthorn can win. I just donโ€™t think they bat deep enough.

โ€œI absolutely admire what theyโ€™ve done.

โ€œI donโ€™t think the two sides up in Sydney can win it.

โ€œGWS are too banged up.โ€

Andy Maher questioned Wallace's call on the Giants, and asked in some of their stars returning over the coming weeks could inject some life into their premiership chances.

โ€œTheyโ€™ve missed too much footy, just a bit of instability. You can probably bring back a couple of them but (bringing six back) is too many.

โ€œI think Richmond, Collingwood and West Coast can win it.

โ€œAnd I think the winner of Melbourne and Geelong, obviously because itโ€™s a knockout game, can win it.

โ€œI reckon the eight is down to four in my opinion.โ€