Madrid - Schalke coach Roberto di Matteo believes his side must score first at the Santiago Bernabeu on Tuesday if they are to have any chance of overturning a 2-0 first leg deficit against Real Madrid in the last 16 of the Champions League.
Madrid destroyed Schalke 9-2 on aggregate on their way to winning the Champions League for a 10th time last season, but have stumbled recently in La Liga.
Carlo Ancelotti's men were beaten for a fourth time in 14 games in 2015 at Athletic Bilbao on Saturday to surrender top spot in La Liga to Barcelona for the first time in five months.