Mexico's most popular sport is association football. It is commonly believed that football was introduced in Mexico by Cornish miners at the end of the 19th century. By 1902 a five-team league had emerged with a strong British influence. Mexico's top clubs are América with 12 championships, Guadalajara with 11, and Toluca with 10. Antonio Carbajal was the first player to appear in five World Cups, and Hugo Sánchez was named best CONCACAF player of the 20th century by IFFHS. Rafael Márquez is the only Mexican to have won the Champions League.