Who are the big 3 in Portuguese football?

So, let's delve into the world of Portuguese football and uncover who are the three dominant forces that shape the landscape of the sport in the country. Who exactly are the "big 3" in Portuguese football that consistently stand out from the rest, capturing the hearts and minds of fans both locally and internationally? Could it be the historic and storied club that has won numerous domestic and international titles, or perhaps the team that boasts a talented roster of young stars? Alternatively, is it the club that has cultivated a fierce rivalry with their counterparts, making for thrilling and memorable matches whenever they face off? As we embark on this journey, let's explore the contenders and ultimately determine who truly reigns supreme as the "big 3" in Portuguese football.