The New England Patriots face an uphill battle in Sunday’s home opener against the visiting Baltimore Ravens, at least according to Tipico Sportsbook. In the latest odds for the upcoming AFC showdown, the Patriots are listed as 2.5-point underdogs at Gillette Stadium, which isn’t a surprise considering the opponent. Yes, the Ravens got embarrassed in a Week 2 fourth-quarter meltdown against the Miami Dolphins, but they’re still a team many consider to be a playoff contender. They also have one of the most electrifying players in the game at quarterback with Lamar Jackson. But this Patriots defense means business. They only gave up one offensive touchdown to the Dolphins, and…