The pair will fight the rematch on Saturday in Diriyah, close to Saudi capital Riyadh, in a hotly-anticipated contest dubbed “Clash on the Dunes”.
Ruiz said, “We’ve got to see where he’s at because all the pressure is on him. The pressure isn’t on me because I followed my dream, made my dreams come true.
“Of course I want more though – I want the legacy of Andy Ruiz Jr.”
Joshua said he was “comfortable” and “very relaxed” ahead of the rematch.
“I am just going to win. I know I can do it,” Joshua said.
“I was this close last time, so next time I won’t mess up,” he added.