His Real Madrid team secured the title with a 3-0 win at Athletic Bilbao this week.
He told RealMadridTV: “I won the league title in Portugal, Italy and England, but this one has been the toughest.
“I’ve won seven league titles overall and I know what it feels like.
“Barcelona won all their games, as befits the great team that they are. They’ve been winning to the very last day.
“They are a club with great tradition that knows we deserved to win this title.”