This data shows that real Madrid was not that stronger than Leganes because everything about the statistics are just a little difference from Leganes, look at the possession 59% and 41% it does not show much strong impact from one side to another, with how famous and realistic real Madrid is, they should have 70% while Leganes will have 30%. the total shots are also poor from real Madrid side because with their best strikers and having only 20 shots is actually small for me and Leganes that has lesser strikers could even make it to 16 shots, I only admire how accurate they are with the shots they had even if it did not resulted to many goals as expected.
Statistically, everything is fine considering the lineup that Ancelotti fielded for this match, and considering the successful start of the match, we can assume that Real did not relax a bit and gave the initiative to Leganes a little. They managed to snatch the victory only in extra time, so the match was expectedly difficult, but I expected that Real would not play with its main lineup, so the main thing is not the statistics, but the result.