Chris Katongo says Sunday's game against Lesotho is the first step for Zambia to push its claim to finish top of Group D to keep the Brazil dreams alive.
Zambia enjoy a three-point lead with six points in Group D heading into this weekend's game against bottom placed Lesotho who have one point.
"I think the mood in camp is fantastic everybody is looking forward to this game I think this is another opportunity that Zambia should use to qualify for the World Cup," Katongo said.
"We should try and capture this opportunity because this opportunity does not come most of the time."
Zambia need to win their remaining four Group A matches to secure a place in the final qualifying round of 10 in November.
"We cannot wait for this opportunity after four years again some of the players won't be around," Katongo said.
Sundays game will be Zambia's first competitive game since their group stage exit from the 2013 Africa Cup in South Africa where they failed to defend their crown.
