Joshua will defend his belts against Andy Ruiz Jr on June 1 but is already eyeing an undisputed title fight against WBC holder Wilder.
“I’m not looking at Dillian anymore, I’m looking at Wilder, because he’s got the belt.
“Ruiz Jr? Provided I get past him, Wilder, that’s my main objective. Simple as that,” Joshua told Sky Sports.
Whyte was in the running to become Joshua’s next opponent and avenge the only loss of his career, sustained in late 2015 with the British title on the line.
After knocking out Derek Chisora last December, Whyte was considered as a challenger for Joshua’s world titles, but couldn’t agree to a deal.
Whyte will instead fight the unbeaten Oscar Rivas on July 20.