They played a weaker side in the league last weekend and took Everton apart, 3 of their back 4 started most of last season KDB could have been played of the season, Aguero is maybe the best striker in the league oh and Mahrez, unless he put their youth team out they don’t have a “weak” side.
Their team tonight is weaker than the team they normally play in the league. KdB and Aguero are only playing because they're coming back from injuries, and they're not match fit.
If we take this match seriously we have a better chance of winning it than the league game. And it's a more important game than the league game.