It's unique to see that Real Madrid's chances are only 31% to win, because they are the defending champions, and their chances should be greater even play away at the Emirates.
I am sure Ancelotti knows what he was doing. It's not the first time Real Madrid met Arsenal; they even met on the ICC (2019), the Emirates Cup (2008), and the UCL (2006), but Real Madrid did not win it all! Guy, in the last 4 matches, Arsenal won 2 matches, and the rest were a tie. This could be homework that should be fixed immediately because in La Liga, Real Madrid also has a problem with the squad; they lost when met Valencia, and it seems their focus was split between the Copa del Rey final, which drained their energy.