Abel Resino has warned his Celta Vigo players to be vigilant against Real Madrid's counter-attacking play when the two sides meet each other on Sunday.
The Celestes are currently fighting for survival in 19th place and a win against los Merengues could allow them to climb out of the relegation zone.
However, in an interview with AS, Resino stressed that, though he is confident he has identified Real Madrid's strengths, stopping them from taking victory will be no easy task.
"We need to play better than them," the 53-year-old replied when asked how Celta could overcome the reigning champions.
"We have to make them uncomfortable. We cannot make mistakes on the ball. We also have to try also and avoid their counter attack, which is deadly. They just need two or three passes to get in front of the goalkeeper.
"We have worked during the week to reduce space as much as possible. In attack we have to return the ball much faster, which is what is lacking a bit in this team."
Resino also dismissed any suggestions that Real Madrid, fresh from their 3-2 aggregate victory against Manchester United in the Champions League this week, might take a less focused approach against his side.
"Large teams never stay relaxed. I played in one of them and my mind was always racing," the former Atletico Madrid goalkeeper added.
"But in football you never know."