Tshepang Moremi scored the only goal of the game at the Orlando Stadium in the first half.
The result left the Buccaneers in third place on the Betway Premiership standings with 18 points from eight games - three points adrift of league leaders Mamelodi Sundowns with two games in hand.
Speaking after the game, Ouaddou praised his players but admitted it was a concern that they were not able to score more goals against sixth-placed Polokwane.
The Bucs boss told SuperSport: "Yes, three important points. It was not easy, I think the guys did well.
"Polokwane were strong especially in the second half. They came to press us in the second half, with a lot of ambition maybe to equalise, but I have to congratulate the boys because they had strength, character, and personality.
"But we wanted to score more goals, we had the chances to definitely kill the game, but it's an area we have to improve especially this Saturday we need to score goals."
Pirates are next in action against Saint-Eloi Lupopo in their CAF Champions League second round second leg qualifier on Saturday.
They are 3-0 down from the first leg. Ouaddou added: "It will be an important game in the history of the club. We know that we need to score four goals but it will not be easy, but we will prepare for that."
Orlando Pirates clinched the Carling Knockout Cup in dramatic fashion at the New Peter Mokaba Stadium, edging Marumo Gallants 1-0 after extra time to secure their second trophy of the season.
Marumo Gallants' goalkeeper Washington Arubi says his side is comfortable being labelled the underdogs ahead of Saturday's Carling Knockout final against Orlando Pirates.
Orlando Pirates face Marumo Gallants in the Carling Knockout Cup final at Peter Mokaba Stadium on Saturday as they attempt to win their second trophy this season.
Orlando Pirates captain Nkosinathi Sibisi is keeping his focus sharply on the Carling Knockout Cup title as his team tops the Betway Premiership table with 28 points after 12 games.
