Why not.
Melzer won his last tourney (although he should have lost), so i'm going for the tourney after final loss method.
Giraldo has also already played 3 matches on this surface, and whilst he was out of form for a while, he's slowly getting back to some solid form that he had at the beginning of the year.
Melzer has never been one for pressure anyway, and knowing he has to win the whole tournament to maybe qualify for London, deep down he probably knows he can't.