better than

[altiwife]

What is correct?
1. I know for sure you can do better than us.
2. I know for sure you can do better than ours.

I guess sentence number two is correct but I may be wrong.

 

[Rover_KE]

#2 does not make sense.

 

[tzfujimino]

"I know for sure your father can do better than ours(=our father)." makes sense, for example.