The Blues faced a tough ask at Stamford Bridge on Tuesday after they fell to a 3-1 defeat during the first leg in France last week.
The 25-year-old is quoted by UEFA.com as saying: "The whole squad is happy. It was tough but we managed to qualify. We planned well for the game and knew that we could score two goals; Jose Mourinho prepared us well.
"We were determined to defend well and stop them playing in midfield. They have a great team, but we were playing at home and have a strong side.
"We knew that it would be difficult after the first leg, but with the quality we have, we always believed that we could do it."
The Brazilian international has made nine European appearances for Chelsea this season.