Wigglesworth, who is set to join Northampton from Sale this summer, started England's midweek games against the Australian Barbarians but couldn't outs Youngs from the Test spot.
And with Danny Care losing his first-choice status to the Leicester Tigers youngster, Wigglesworth admits he has his work cut out to earn a starting place before next year's World Cup.
"You have to give everything you have got and we are playing catch-up to Youngs," said Wigglesworth.
"Fair play to him, he was outstanding. Even if you take away the try the rest of his game was really impressive. He has certainly set the bar very high.
"There is a lot of competition in the country at scrum-half and that competition breeds good performances.
"When I got into the squad I was asked whether I was worried about the depth in the position and I said I wasn't because there were lots of young guys coming through.
"I got laughed at and now I have been proved right. It is one of the strongest positions we have in the country."