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.
Although the percentage of chances of winning is only 31%, it is quite good, considering the club to be faced is not a weak club that can be defeated easily, Arsenal have pretty good winning statistics this season, their attack performance has increased significantly, it's just that Arsenal must be careful to maintain the defense line, because Arsenal less than optimal defense line can be a boomerang, Real Madrid has a fast and directed attack, if the defense is fragile, they will easily break through to score goals, and if you pay attention to the previous match, one of the causes of defeat is because the defense line is not optimal.
Soon we will see these two Clubs will compete, my personal prediction, in this match the possibility of a draw is very large, and still as before, i will install a victory for Real Madrid with a narrow victory score.