Bayern Munich players have urged an instant reaction on Tuesday in the Champions League at Manchester United in the wake of a heavy 5-1 Bundesliga defeat at Eintracht Frankfurt. Bayern are already confirmed as group winners before the trip to Old Trafford where United must win to stand a chance of advancing. But the game is now important for Bayern to get back on track ahead of the final two league matches of the year against high-flying VfB Stuttgart and at Wolfsburg. “We want to show that this was only a slip-up,” midfielder Leon Goretzka said after the first Bundesliga season defeat. Forwar…