Star Wallabies prop Allan Alaalatoa is in major danger of missing the Rugby World Cup after he was stretchered off the MCG during the Bledisloe Cup clash with New Zealand.

With three minutes remaining in the first half and the Australians trailing 12-7, the prop’s leg got caught as a scrum went to ground.

Alaalaota looked in obvious pain, with reports he had ruptured an Achilles.

Any serious injury would see him miss the tournament which gets underway in early September in France.

The prop was leading the team with the two Wallabies co-captains off the field.

James Slipper started on the bench while Michael Hooper is sidelined with a calf injury.