Pirates suffered a disappointing 2-1 defeat at the hands of Zamalek despite dominating most parts of the game and opening the scoring on Saturday.
Eric Tinkler's men dominated proceedings in the first half, creating numerous clear goal-scroing opportunities, and should have been at least three goals to the good at the half-time break.
However, it took substitue Lehlohonolo Majoro to open the scoring after the hour mark, and the Soweto side were then made to rue their missed opportunities.
Manyisa, though, argues that his team gave their best but were unlucky as they failed to convert their many chances during the game.
"There was nothing that went wrong for us, the only thing was that Zamalek took their chances and we didn't convert ours," Manyisa says.
With the Egyptian side right in the middle of their domestic season, Pirates are subdued to just one competitive fixture every two weeks.
The Bafana Bafana midfielder is not phased that the team have not had much of a break and feels that the team just needs to work on team building during the domestic pre-season.
"For us we take [pre-season] as a team-building] because we've been together for a while now [since the PSL season ended]," he says.
"It's not pre-season for us, it's only to rectify the areas that we have been lacking in."