Iker Casillas says that Real Madrid have to win all of their home games in the Champions League.
Madrid host Ajax at the Santiago Bernabeu in their opening game in Europe's most prestigious club competition on Wednesday and Casillas believes that they will have to stay focused and not lose concentration.
"We are excited about the Champions League," the Spain international is quoted as saying by Realmadrid.com. "This is a complicated group and we don't want to lose any points at home. Ajax's Luis Suarez is a great player, so we have to take advantage of the fact that he is unable to play."
Looking back on Saturday's narrow 1-0 win against Osasuna, the Madrid captain was pleased with the performance of the defenders in front of him.
"We barely let Osasuna put together any scoring opportunities. This is due to the fact that every line is working at all times. We are solid and strong and hope to continue in this mould.
"The fact that we haven't conceded a goal in the first two games is big news. The best player in the two games we have played has been the opposing goalkeeper. Players like Ricardo Carvalho are necessary for any team. It is always good to have experienced players. He brings players together, which is important for us."
Meanwhile, Casillas commented on city rivals Atletico Madrid and their strong start to the season.
"Atletico appear to be title contenders. They are playing good, effective football. They deserve to be among the top teams, which will also make the league more exciting."