Fulham boss Martin Jol felt his players underperformed in their 0-0 draw with Faroe Island part-timers NSI.
Fulham, who won the first leg 3-0 at Craven Cottage, were never in danger and created a series of chances but Jol wants to see more from his squad.
"It's not easy playing here but I feel if you create six or seven chances in the first half you should score," Jol said.
"In the first half we had seven or eight good chances and we have to be more productive and eager to score. In the second half I think we only had two chances which weren't enough.
"We have to get fitter and more creative and come up with solutions. In this sort of game you need players that can make a difference and we didn't have that today.
"Defensively we were sound and we didn't concede, which is important but they did have one chance at the end. Technically you can see the difference between the players but they did well today."
Fulham meet Crusaders from Northern Ireland in the second qualification round next Thursday.