With half of the Champions League group stage games done and dusted, matchday four brings a clearer shape to Europe's top competition as the best pull ahead of the rest in the race to qualify for the knockout rounds.
In Group G though, it is still anybody's guess as to who will make it into the last-16 as holders Real Madrid, Roma and CSKA Moscow all chase the top two spots.
Santiago Solari - taking charge of his first Champions League game - knows that a win will keep his Los Blancos side in prime position to progress but will be wary of opponents Viktoria Plzen, who could throw themselves back into the race with a win themselves.