Understanding role of Luck in top eleven

[IImaestroII]

My two semifinals.
Before those games I was facing two easy League opponents 40% quality.
In the first League game I didn't have good performance but had great stats in the Cup game later.

The opposite happened yesterday.
Super performance and stats in the league game but hardly won this time my Cup opponent.

This thing affected me a lot, i had easy league matches against tankers then poor perfonmances on important matches in the same day like cup or cl. From next season i will try to use reserves for matches vs tankers, but the problem come when you want the player win the top scorer challenge. So many things to take in consideration now during the season that can make the difference from winning titles or nothing.