Palmer took the No. 20 shirt when he arrived at Stamford Bridge from Manchester City in the summer of 2023.
The 23-year-old donned the new number on Monday, when the Blues defeated Los Angeles FC 2-0 at the Club World Cup.
“Messi, the big one, Rooney and players like that,” Palmer replied, when asked about his role models that wore the number.
“It’s just an iconic number. I wore No. 10 all my life growing up and I just like the number.”
Palmer takes the Chelsea no. 10 shirt from Mykhailo Mudryk.
Mudryk is facing a potential four-year ban for charges relating to a positive drugs test.
“I have not spoken to Misha yet but I will when the time is right,” Palmer added.