Speaking to reporters ahead of the Marseille clash, Alonso was effusive in his praise for Carvajal.
"There's one aspect that hasn't changed much: the competitive gene he has. Because he came in 2013-14 and he already had it," the Madrid gaffer said. "Since he arrived from Bayer Leverkusen, he was very important, and that first season... he gave us so much, even winning the Champions League. Over the years, that hasn't changed much, but his personality, maturity, influence; what it means to be a captain with his experience, as well as the respect his teammates have for him and what he has to transmit, that responsibility he has towards the group, is something that has evolved.
"In the United States, he was still recovering, but now that he's fit and ready to play, he has a very important positive influence on the rest. And those leaders we have to keep... not building, but flourishing within a locker room, are fundamental. Carva is one of them, although there are many others we need to create a strong core, to pull the rest together. With Carva, you see that over time, he's embraced it, just like others did and those he saw. Now, it's his turn."