London Irish head coach Toby Booth pointed an accusing finger at his players after they were thumped 39-14 at Sale in the LV= Cup.
The Exiles had won 39-26 in Sunday's Aviva Premiership clash between the sides but this time they were on the receiving end as a youthful Sale outfit scored six tries.
He said: "From a youngsters' point of view, you get some very stark feedback of where they are in their progression after a performance like that. We've come off second-best and rightfully so."
"There have been some other performances from some more established players who we would have expected better from and we cannot dress over that.
"When you pull on that jersey with a London Irish badge on it, there is a level of performance that is acceptable and unacceptable. Some of that tonight was not up to the required standard and we will be taking that up with the right people after the weekend.
"To concede like we did - so easily at times - is very disappointing and we'll be making sure we address that."
The plaudits rightly belonged to Sale on a night when many of their youngsters rose to the challenge in style.
Sharks coach Byron Hayward singled out fly-half Rob Miller for special praise after he orchestrated the victory.
"I thought Rob Miller ran the game really well from behind the scrum," said Hayward of the former Newcastle man. "It was great to see the youngsters coming through; the boys that have been playing for the Jets.
"We tried to get it over to the guys this week that it's about enjoyment and getting their heads up and expresssing themselves. That's exactly what they did and with a bit more accuracy on the end of a few more moves we could have scored a few more tries."