Real Madrid players celebrate at the end of the Women's Champions League quarterfinal first leg soccer match between Real Madrid and Arsenal at the Alfredo di Stefano stadium in Madrid, Spain.

Arsenal's Chloe Kelly, left and Real Madrid's Olga Carmona challenge for the ball during the Women's Champions League quarterfinal first leg soccer match between Real Madrid and Arsenal at the Alfredo di Stefano stadium in Madrid, Spain.

Arsenal's Chloe Kelly, left is chased by Real Madrid's Olga Carmona during the Women's Champions League quarterfinal first leg soccer match between Real Madrid and Arsenal at the Alfredo di Stefano stadium in Madrid, Spain.

Real Madrid's Athenea del Castillo, centre, celebrates with Real Madrid's captain Olga Carmona, right, after scoring her side's second goal during the Women's Champions League quarterfinal first leg soccer match between Real Madrid and Arsenal at the Alfredo di Stefano stadium in Madrid, Spain.

Real Madrid's Athenea del Castillo, right, celebrates after scoring her side's second goal during the Women's Champions League quarterfinal first leg soccer match between Real Madrid and Arsenal at the Alfredo di Stefano stadium in Madrid, Spain.

Real Madrid's Signe Bruun, left, falls in front of Arsenal's Katie McCabe during the Women's Champions League quarterfinal first leg soccer match between Real Madrid and Arsenal at the Alfredo di Stefano stadium in Madrid, Spain.

Arsenal's Katie McCabe, right, crosses the ball under pressure from Real Madrid's Ingrid Filippa Angeldahl during the Women's Champions League quarterfinal first leg soccer match between Real Madrid and Arsenal at the Alfredo di Stefano stadium in Madrid, Spain.

Arsenal's Alessia Russo controls the ball during the Women's Champions League quarterfinal first leg soccer match between Real Madrid and Arsenal at the Alfredo di Stefano stadium in Madrid, Spain.

Real Madrid's Signe Bruun, centre, runs towards her team mate Caicedo who scored the opening goal during the Women's Champions League quarterfinal first leg soccer match between Real Madrid and Arsenal at the Alfredo di Stefano stadium in Madrid, Spain.

Real Madrid's Caicedo, 3rd left, scores the opening goal during the Women's Champions League quarterfinal first leg soccer match between Real Madrid and Arsenal at the Alfredo di Stefano stadium in Madrid, Spain.