MADRID, April 29 : Antoine Griezmann said Atletico Madrid must carry their second-half snap and snarl into the return leg of their Champions League semi-final against Arsenal after a 1-1 first-leg draw on Wednesday that bubbled away without ever truly boiling over. Julian Alvarez's second-half spot kick cancelled out Viktor Gyokeres's first-half goal for Arsenal, leaving Atletico arguably the more frustrated side after a match they largely controlled but could not fully bend to their will. The