Jose Mourinho's most successful spell came during his first tenure at Real Madrid from 2010 to 2013, where he achieved a remarkable 76.3% win rate. That period yielded one La Liga championship and one Copa del Rey, establishing Mourinho as one of the club's most effective managers in recent history.

The 2011-12 campaign stands as Mourinho's crowning achievement at Real Madrid, when he guided the team to a record 100 points in La Liga. That milestone remains unbeaten to this day, showcasing the Portuguese manager's tactical precision and ability to extract maximum performance from elite talent across an entire season.

His time at FC Porto from 2002-04 ranks as a close second, posting a 75.9% win rate while securing two league titles. Most notably, Mourinho delivered Champions League glory to Porto in 2003, launching his reputation as a European specialist. These contrasting successes highlight how Mourinho consistently elevates teams beyond their perceived ceiling.

Mourinho's track record shows he thrives when implementing disciplined systems at clubs ready for immediate transformation, whether in Spain's capital or Portugal's northern coast.