Cristiano Ronaldo insisted he was happy at Real Madrid, but the star forward was noncommittal about a possible contract extension.

Ronaldo scored a brace on his 400th Madrid appearance to guide the LaLiga giants to a 3-1 Champions League win over Borussia Dortmund on Tuesday.

The Portugal star is contracted until mid-2021, but seemingly may consider a renewal.

However, Ronaldo said any questions about his contract should be directed to Madrid president Florentino Perez, although the former Manchester United star said he was happy in the Spanish capital.

"If I will renew? It's a good question," he told Atresmedia.

"I am glad. Things happen naturally, but it is a question that the president can answer best.

"I'm happy, I do what I like and I'm happy."

Ronaldo joined Madrid from United in 2009 and has won three Champions League crowns and two LaLiga titles among numerous individual honours.