"I would say Sarri's philosophy has helped me a lot," Barkley told British media. "Over the years, I haven't been coached much and I am at an age now where I understand football a lot more.
"I know how important it is to take the different tactics from different managers on board. I feel like right now I'm ready to understand every aspect of the game."
Barkley, whose career has been disrupted by injury, has not played for England since May 2016 but said his performances for Chelsea this season proved he was ready for a return to the national team.
News that makes sense
Your trusted source for staying up-to-date with the world around you. Get free daily news updates and analysis, straight to your inbox.
"From a technical point of view (Sarri), is making me a better player," Barkley added. "I'm playing a big role in the side and I think my performances show that I'm capable of being in the England squad now."
England face Croatia and Spain in the UEFA Nations League this month, with manager Gareth Southgate set to announce his squad later on Thursday.
(Reporting by Simon Jennings in Bengaluru; Editing by John O'Brien)
