This is his car, we need each other at top form to guard the other's back.

He was only one man, with a boy of ten to guard his back.

It was all I could do to force myself to stand still and guard his back.

We're almost there, so stand ready to guard my back.

Use these tips at home, work, and play to guard your back.

I shall guard my own back in future, and not let you do it.

He left them there with orders to guard his back.

Man on the way up needs somebody like you to guard his back.

He would just have to guard his own back.

He might well need it to guard his back.