Swindon manager Danny Wilson bemoaned his side`s lack of a cutting edge as they were knocked out of the Johnstone`s Paint Trophy 4-2 on penalties by Brentford following a 1-1 draw.
Charlie Austin had fired the Robins in front, but Robbie Simpson equalised against the run of play for the Bees.
Simpson was the hero in the shoot-out, scoring the winning penalty.
"You`ve seen the chances we`ve had and created in the course of the game," said Wilson. "If you don`t take those gilt-edged chances - and they are not difficult chances - then you`re going to struggle.
"I thought we played with a great tempo on Saturday but I didn`t think we were at the races in this game. The tempo we showed on Saturday was not there.
"The ball came back off our strikers far too often and we couldn`t get any momentum to keep them in their half to put the pressure on them.
"But give them credit as well, I thought they defended better than Plymouth. They had a great gameplan and persevered all the way to the death."