2. Most titles won in a single year (Barcelona)
Pep Guardiola’s four years at Barcelona were incredible, with his first two seasons being the finest of his career.
The Catalan won a La Liga, the Copa del Rey, and the UEFA Champions League in 2008/09. A Supercopa de Espana and the European Super Cup followed later in 2009 before Barcelona won the FIFA Club World Cup.
Therefore, they won an incredible six trophies.
No one has come close to breaking that record since then.