Real Madrid assistant manager Aitor Karanka rued the potential impact on its Champions League chances after injuries to Marcelo and Luka Modric in its 3-1 win over Real Betis on Saturday.

Two goals from Mesut Ozil and another from Karim Benzema stretched Real's advantage over city rival Atletico to six points in La Liga.

But Karanka's major concern was seeing the Brazilian and Croatian stars limp off ahead of Wednesday's Champions League semifinal first leg against Borussia Dortmund.