BEIJING:
The Italian failed to defend his title in New York this month after Alcaraz emphatically overpowered him in four sets and snatched back the world number one ranking.
Four-time Grand Slam champion Sinner said afterwards he would need to be more unpredictable in his play if he was going to beat his rival from Spain.
"We've been reflecting a lot," the 24-year-old Sinner said in Beijing, where he returns to action at the China Open.
He was beaten in the final by Alcaraz a year ago in three thrilling sets.
"We are changing a lot of small things where I'm thinking of now," added the world number two, without divulging what the alterations were.
Sinner will try out the adjustments to his game in the Chinese capital and said they will come with a small price.
"The amount of mistake