San Francisco 49ers fans have been left fearing the worst even before the Super Bowl got underway after spotting Taylor Swift and NFL commissioner Roger Goodell in conversation in the stands. The hugely popular singer has brought a whole new audience to the NFL this season through her budding relationship with Kansas City Chiefs star Travis Kelce. The ‘Taylor Swift effect’ has seen a surge in viewership figures and the Chiefs have also benefitted with a huge increase in merchandise sales. It’s something that Goodell admitted this week the sport as a whole has benefitted from all year long. “Ha…