Athletic Bilbao have won their last Cup match, but they are winless for their recent 8 league fixtures.
As for Osasuna, they have suffered 2 successive defeats in the league, and their away quality is poor, with problems in defensive end.
Now the AH line is -0.50 for the hosts, which is still in favor of a home win.
So Athletic Bilbao are expected to win this match as well as in AH payout.