Nerves are a problem
The England fly-half added: "He's passed on his best and that's fantastic. It was great working with him."
Even though England should win their first game of the tournament against Georgia easily, Wilkinson is still a bit nervous.
"I am desperately keen to get going and get some game time," he said.
"There's no worse feeling than hanging around with those nerves and anxiety but there is time to get some work done."
The Rugby World Cup starts on Friday 10 October.