Real Madrid coach Carlo Ancelotti says winning the Fifa Club World Cup is the perfect end to an "unforgettable" year which saw them win four trophies.
The Spanish side beat South American champions San Lorenzo 2-0 on Saturday, adding to their Champions League, Copa del Rey and Uefa Super Cup triumphs.
"We have done really well this year, it's been unforgettable. We are a team and a family," said the Italian.
"We deserved to win the title, we can say we are the best team in the world."
Spain defender Sergio Ramos headed in a first-half opener before a goalkeeping error allowed Gareth Bale to double their advantage after the break.
Victory extended their Spanish-record run of consecutive wins to 22 matches in all competitions and ended a successful 2014 on a high.
Real finished third behind Atletico Madrid and Barcelona last season, but are now leading La Liga by a point as the Spanish season enters its mid-season winter break.
They have scored 178 goals in all competitions this year, more than any other Spanish side within a calendar year.