Toni Kroos has described Real Madrid's draw with Atletico Madrid as a "dangerous result" after both sides failed to score in the first leg of their quarter-final tie in the Champions League.
The stalemate means that Real will have to win the second leg outright if they are to advance to the semi-finals of the competition.
Kroos is remaining cautious about the game as Atletico still have the chance of going through on the away-goals rule.
"We should have beaten Atletico. It wouldn't have been unjust, but we have to accept the result for what it is," the German midfielder said, according to Goal.com.
"However, 0-0 is a dangerous result for us with the current away-goals rule."
Carlo Ancelotti's men have failed to beat Diego Simeone's side in seven attempts this season, having lost to them twice in La Liga.
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