The well-travelled Chippa United coach guided the DR Congo side to second place in the Linafoot behind Champions Jeunesse Sportive de Kinshasa last season.
They were rewarded with a place in the Champions League and overcame Al-Merrikh 1-0 over two legs in their first qualifier as Pirates beat Lesotho Premier League side Lioli FC.
Speaking ahead of the weekend's game, Eymael, who is back in the Betway Premiership with the Chilli Boys, said Pirates must be prepared for a difficult encounter in front of passionate fans.
He said on Soccer Laduma: "First of all, we qualified Lupopo for the Champions League.
"If I'm right, the first game will be in Lupopo, and it will not be easy for Pirates to go there and get a positive result. The stadium will be full, and the fans will be the 13th man of the team. Also, it's an artificial pitch, and the environment will be a bit hostile for Pirates but very positive for Lupopo.
"Pirates will feel it. Lupopo have also made some changes since I left, both tactically and in terms of personnel."
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.
