The first group of wrestlers completed weigh-ins at the 2001 Greco-Roman World Championships in Patras, Greece this evening.    Here is what some of the United States wrestlers thought about their pairings.    Kevin Bracken at 63 kg  "I think the draw is fine. It's good to not have a World Champion the first match. I have to beat everyone to win anyways, so it's OK. I feel really good. I'm looking forward to tomorrow."    Keith Sieracki at 76 kg  "I'm actually pretty happy with my draw as long as I wrestle up to my capabilities. I should do alright in my pool. I just need to perform up to my standard if I want to be a World Champion."     Jason Loukides at 97 kkg  "I'm feeling better. I didn't have much time to train, but I'm very excited. It's exciting for me to be a part of the team and doing everything. I'm ready for my chance. I don't know the guys in my pool very well, but that's OK."