Behind the success of Real Madrid is Luca Modric big role and Madrid's efforts to extend Modric contract should be done as a tribute. I am one of the people who have admired the Croatian midfielder since he was at Tottenham because his playing style is similar to Zidane in my opinion.
Luca Modric age is quite old and next season will be different in the quality of his game with Real Madrid. His role in the team will decline next season. Physically, they will tire quickly and will not be able to play full time.
Strategy and players are the most important factors why a team can achieve success. It's useless to have great players but the coach doesn't have a good strategy because it won't change anything for his team. The main goal is to win the title at the end of the season or competition, so there has to be good cooperation between the coach and the players. Ancelotti and all his players are considered commensurate this season, they can work well together so that Real Madrid won two prestigious titles at the end of the season.
I mentioned a little bit about Barcelona, I really hope they can be the toughest competitors for Real Madrid and other teams next season. Xavi has to work harder to improve the quality of the team and I hope he can also bring in some new players next season.