Real Madrid midfielder Casemiro insists there'll be no underestimating Chelsea ahead of their Champions League quarterfinal second-leg.

Madrid triumphed 3-1 in last week's first leg at Stamford Bridge, prompting manager Thomas Tuchel to effectively concede that the Blues would be surrendering their European crown.

Casemiro insisted the Spanish outfit know they still have plenty of work to do to reach the semi-finals.

“We won't fall for that," Casemiro said of Tuchel's comments after the first leg. “We played probably what was the best 90 minutes of our season in London last week and took a major step closer to qualifying for the semi-final but we can't get overly confident.

“We all heard what Thomas Tuchel said. We don't buy it. We know that it will be a tough game. They are defending champions and we won't take this game lightly, I can assure you of that.

“We'll need our fans to be there and support us from the beginning. We can't get overconfident and need our fans to create a great atmosphere so we can advance to the semi-finals."