Pakistan captain Waqar Younis admitted his side needed to make widespread improvements ahead of their crunch game against India on Saturday.
Pakistan failed to impress despite comfortably defeating Holland by 97 runs at Paarl, and there will be particular concern about the batting display.
Only man of the match Yousuf Youhana surpassed 50, while Waqar was also disappointed to have given away 40 extras.
"We should have got 300 on that wicket," Waqar said.
"And then we didn't bowl that well - giving away so many easy runs was a worry.
"Perhaps we were a little lethargic playing against a weaker side but there are a few things we've got to improve on and talk about in the next few days."
The bright spot for Pakistan was Wasim Akram's 500th one day international wicket, which he captured in the second over of Holland's innings.
"I felt a lot of pressure; in fact, I could hardly sleep last night. I was as nervous as any young sportsman ahead of a big game," he admitted.
"I'm very excited but in the end what matters is that Pakistan should qualify.
"I would like to dedicate this to all the people who have supported me in the last 18 years."
The 36-year-old left-arm fast bowler mentioned two former Pakistan captains as the biggest influences on his career.
"Imran (Khan) was the main man who helped me, and Javed Miandad," he said.
Waqar paid a warm tribute to his team-mate.
"I just want to salute him. It is an outstanding achievement for him and for Pakistani cricket. I don't see anybody else bettering his achievement," he said.
He also expressed his faith in Inzamam-ul Haq, whose previous two innings have lasted a combined three balls with no runs, and said he believed the prolific batsman still had had a huge role to play in the World Cup.
"He is one our best players and has performed brilliantly for Pakistan in the past," added Waqar.
"Hopefully, he will get some more runs in the next game against India."