Azpilicueta has backed new recruits Werner and Ziyech to steal a march on the new Premier League season.
"Both of them have shown their quality in training in these past couple of weeks," said Azpilicueta.
"We have seen their potential offensively, the way they can create chances and the way they can score goals so they are big additions to the team.
"The quicker and easier they can adapt to the Premier League, the better it will be for everybody so it was good to have them with the group for a few weeks at the end of the season.
"They are already integrated and know everybody so it's been a very good time for that and now we're all looking forward to seeing them on the pitch."