Former All Black Zac Guildford has suffered a setback in his Super Rugby return.

Guildford has been ruled out of the Waratahs team to play the Brumbies this Saturday due to a broken foot.

Guildford was a regular starter for the Waratahs so far this season before picking up the injury.

The Waratahs will play the Brumbies at 9.40pm this Saturday.

Source: Radio NZ