Norwich lose Tierney for remainder of season
Tierney, 26, had been hoping to return from almost four months on the sidelines during the Canaries' Premier League run-in.
But he aggravated the problem playing for the reserves last Tuesday and a specialist deemed an operation necessary.
Canaries boss Paul Lambert said: "Marc Tierney has had operation on his groin injury and will be out until pre-season.
"Ayala has seen a specialist but hasn't needed surgery."