Tom Brady is old news to one of his biggest supporters ... 'cause stunning model Veronika Rajek apparently has her eyes on a new man -- Taylor Swift's boyfriend, Travis Kelce.
Veronika -- who went viral after professing her love for the seven-time Super Bowl champion last season -- was in the crowd to catch the Las Vegas Raiders vs. Kansas City Chiefs matchup at Allegiant Stadium on Sunday ... and it's safe to say she liked what she saw, specifically one player in particular.