Azpilicueta believes Kepa can improve on his game and become an integral part of the Premier League side.
The Spaniard joined Chelsea from Athletic Bilbao for a world record fee for a goalkeeper ahead of the 2018/2019 season.
And after a fairly good season, where he helped the Blues to win the Europa League title, Kepa has consistently put up subpar performances.
The 26-year-old was relegated to the bench after the arrival of Edouard Mendy last summer.
Kepa has been given a fresh start under new head coach Thomas Tuchel as he started two games out of the first seven matches of the German.
Ahead of Chelsea’s game against Atletico Madrid in the Champions League Round of 16 on Tuesday, Azpilicueta has told Mundo Deportivo of Kepa: “I'm not the one to give him a chance. That's up to Tuchel.
“I am his team-mate and his friend. I have a close relationship with him because we are also team-mates from the national team and I can guarantee that he is working hard.
“He has suffered like anyone who does not play but the career of a footballer has bumps, it is not a bed of roses.
“You have to be humble. And he is young, with the future ahead of him. I'm sure he will continue to contribute a lot to Chelsea.”
