Real Madrid boss Zinedine Zidane has insisted that he has 'no concerns' over his team's form entering Tuesday's Champions League Group F clash with Borussia Dortmund.

The Spanish giants have made an unbeaten start to the new campaign, but struggled to overcome Sporting Lisbon in their first European match this season - needing two late goals to beat the Portuguese side.

Los Blancos will also enter the match off the back of successive La Liga draws, but Zidane has said that he is relaxed ahead of Tuesday's clash with the Bundesliga outfit.

"No, absolutely not and not because we are changing competitions, either. This can happen and it may happen again. We know what we want to do, we know what we need to be working on to achieve things," Zidane told reporters.

"The team is in good shape. Nobody likes to lose four points in two games but football is like that. Sometimes it's good to give you a warning and then you continue on your way with your work."

Real Madrid and Dortmund last met in the quarter-finals of the 2013-14 season and it was Real Madrid that advanced courtesy of a 3-2 aggregate win.