Aaron Cresswell says Jose Fonte has settled quickly at West Ham.
Fonte arrived last month from Southampton.
Hammers fullback Cresswell said: "He is another player who has settled in straight away and is a great leader and has a lot of experience.
"You could see straight away the leadership qualities he will bring into the squad and you get that feeling that he has the quality. He is a fantastic defender."
West Ham, who are currently ninth in the Premier League table, have won three of their last four top-flight fixtures.