There were many hard-fought battles back and forth in the long slog that was Day 1. However, a few battlers managed to stave off the "back" and only provide "forth." Here are the undefeated decklists after Round 10 here in Nashville. Oh, and also Conley Woods' and a few other 9-1 lists. Because though these fighters dropped Round 10, the official Day 2 cut-off was after Round 9 so they were technically undefeated going into Day 2, and, well, because I like them.
Paul Rietzl, 10-0
Grand-Prix Nashville 2010 Day 1 Undefeated
Erik Landriz, 10-0
Grand-Prix Nashville 2010 Day 1 Undefeated
Kyle Stoll, 10-0
Grand-Prix Nashville 2010 Day 1 Undefeated
Nick Hennig, 9-0-1
Grand-Prix Nashville 2010 Day 1 Undefeated
Conley Woods, 9-1
Grand-Prix Nashville 2010 Day 1 Undefeated
Pat Price, 9-1
Grand-Prix Nashville 2010 Day 1 Undefeated
Joseph Price, 9-1
Grand-Prix Nashville 2010 Day 1 Undefeated