Barca downed by Monaco as Arsenal held in Champions League stalemate

French club Monaco upset 10-man Barcelona by grinding out a 2-1 victory on Thursday in the Champions League, while a stunning David Raya double-save ensured Arsenal a goalless draw away to Europa League winners Atalanta.In Italy, Arsenal goalkeeper Raya earned his side a point in a tough start to their campaign against Atalanta with a 0-0 draw.