Club Atlético de Madrid is a Spanish professional football club based in Madrid, competing in La Liga. Commonly known as Atlético Madrid or simply Atlético, the club plays its home matches at the Metropolitano Stadium. Founded in 1903, the club's colors are red, white, and blue, and they are nicknamed "Los Colchoneros" (The Mattress Makers) due to their historic striped kit. Traditionally seen as the underdog to city rivals Real Madrid, Atlético has forged a powerful identity based on grit, defensive solidity, and fierce determination. The club's golden era under manager Diego Simeone, beginning in 2011, has been its most successful, breaking the duopoly of Barcelona and Real Madrid to win La Liga in 2014 and 2021, along with multiple UEFA Europa League titles and reaching two Champions League finals. The current squad, featuring stars like Antoine Griezmann and Jan Oblak, continues to embody Simeone's intense, never-say-die philosophy. The fan base is renowned for its passionate and vocal support, creating a formidable atmosphere at home. Atlético Madrid is a club that has built a modern dynasty on the foundations of sheer will and collective strength.