don't forget melzer is one of the best return players on tour.
God, I can't remember the last time I read a compliment about Melzer...poor guy.
He does well against serve-volleyers (Isner, Karlovic, Llodra) but Lopez isn't all that, even if he is a little limited. And Melzer doesn't have an impressive record against big servers, generally, so...
It really is one that could go either way...to quote ryan, choose "red" or "black."
I'd probably lean slightly more to Melzer, only on current circumstances, but ivan makes a very good point about Lopez's pedigree in these kind of events...the guy is physically very strong, while Melzer, certainly mentally, is weak as piss, as anyone knows.
I hope this goes to 5 sets (preferably a match-deciding tiebreak) with several fluctations so you can all feel pain.