Southampton Under-18s boss Paul Hardyman was left frustrated after his side exited the FA Youth Cup with a 2-1 defeat at Watford in the fourth round.
Kornelius Hansen netted from the penalty spot for Saints in the first half, but a pair of goals either side of that strike from Ryan Cassidy sent the Hornets through.
Hardyman said: "It was a disappointing performance. There's a lot of disappointed lads in there, but there's no one more disappointed than myself, because I see the lads day in and day out and how hard they work and what they put into training, and I see the quality they've got, and we haven't shown it tonight.
"We were out-worked. I wouldn't say we were outplayed, because we probably created five excellent goalscoring opportunities, but we haven't taken them.
"It was a bit of a recipe for disaster, because at one end we were conceding sloppy goals and then at the other we weren't taking the chances.
"Those are the frustrating bits and the bits they've got to learn. It's not just about the niceties of football and getting on the ball, it's about work-rate, it's about digging in, about going toe-to-toe with your opponent and seeing who's going to out-work and out-fight the other, and unfortunately for us tonight Watford out-fought us."