Its selection index is always 1 though.
So, from what I understood, you need these conditions:
[Selection's Index is equal to 1
or Selection's Rank is equal to 1]
and
Selection's Trigger Expression matching_number is equal to 2
I took the first two conditions into square brackets to emphasize that it is a block, i.e. you need to add a block, then two conditions inside it, then another condition outside.
The third condition is needed in case 0-0 is the favourite.