Mourinho began working with Robson's successor at Barcelona , Louis van Gaal , and he learnt much from the Dutchman's conscientious style. Both assistant and head coach combined their studious approach to the game and Barcelona won La Liga twice in Van Gaal's first two years as coach. Van Gaal saw that his number two had the promise to be more than a skilled assistant. He let Mourinho develop his own independent coaching style and entrusted him with the coaching duties of FC Barcelona B. Van Gaal also let Mourinho take charge of the first team (acting as Mourinho's assistant himself) for certain trophies, like the Copa Catalunya, which Mourinho won in 2000