The Italian thought the Turks would have made life more difficult for Los Blancos, particularly after the first-half dismissal of Sergio Ramos for a professional foul
Sergio Ramos was sent off early in the game but goals from Gareth Bale, Alvaro Arbeloa, Angel Di Maria and Isco ensured that Umut Bulut's equalizer just before halftime was insignificant.
Ancelotti was sightly shocked at how the Blancos swept aside Roberto Mancini's men and argued that Juventus, which defeated Copenhagen 3-1 to move second, now has the edge in the battle to follow Madrid through to the last 16.
"After being left 10 players on the pitch I didn't expect a game of that easiness," the Italian told Spor Smart.
"We made some changes in our system. My team reacted well in the second half and that's how we won it.
"Juve are one step ahead of Galatasaray, because a draw will be enough for them. But Galatasaray have very passionate supporters. They can win this game. It will be a perfect match."
Cristiano Ronaldo missed the game at the Santiago Bernabeu through injury but Ancelotti still took time out to back the Portugal international's bid for this year's Ballon d'Or.
"Yes, Ronaldo is the best player in the world," the former AC Milan boss stated. "Statistics show that he is the best in the world by far.
"His teammates continue to help him and he's doing his best [to recover]."