It is betfair bet, lay Fed 3-0 in setbetting and every other result = bet won
For the market to which you refer, Betfair offers the following options:
While these options are all mutually exclusive (two or more cannot occur at the same time), they are not collectively exhaustive (there exist possilibilities outside of the listed options that can occur).
Ie. If either player were to retire/withdraw prior to the completion of the match for whatever reason, or if the tournament were to be cancelled, then your bet would be refunded.
Thus, it is incorrect to say "every other result = bet won".