Madrid, March 5 -- Real Madrid secured a 2-1 advantage over Atletico Madrid in the first leg of their Champions League last-16 tie on Tuesday night, setting up a finely balanced return leg next week. Brahim Diaz scored the decisive goal 10 minutes into the second half, capping off a match that featured an open first half and a more cautious second period. Real Madrid's Fede Valverde started at right back, with Diaz stepping in for the suspended Jude Bellingham. Atletico boss Diego Simeone opted for Antoine Griezmann and Julian Alvarez in his attack. The hosts took an early lead in the third minute when Rodrygo latched onto a pass from Valverde, cut inside past Atletico left back Javi Galan, and curled a shot into the far corner past Jan Obl...