After the match he said he was fine and ready for tomorrow's match.
"I'm a bit bruised but nothing a good massage can't work out. A game is a game. If you can't take those types of knocks why should you show up?"
Before the incident Kotze had been instrumental in his team's best performance in a World Cup since their first tournament in 1999. He went on a drop goal kicking spree, knocking over three in the first half, add to that a couple of penalties and there were memories of the great Naas Botha from Kotze's neighbouring country of South Africa.
The team ranked 20 at this year's tournament take on 10th place Samoa in what promises to be a fast flowing, action-packed match similar to last Saturday's game with Fiji.
Namibian coach Johan Diergaardt said the team would have to play mistake-free rugby if they wanted to beat Samoa.
"I'm a little bit disappointed in some of the mistakes we made [against Fiji] but the overall structure of the game I'm satisfied. Unfortunately we couldn't win."
The coach has made four changes to the team which played on Saturday, opting for speed and physicality against Samoa.
Left wing Conrad Marais has been replaced with the speedster Llewellyn Winkler, lock Nico Esterhuyse has been moved to the bench to make room for Henk Franken, while Jacques Nieuwenhuis has moved from No8 to the blindside and Tinus Du Plessis has been replaced by the bigger PJ Van Lill.
Diergaardt said Namibia would look to control the ball better at the contact area and wanted to play a more expansive game against Samoa.
Namibian captain Jacques Burger said the team needed to back their own ability to play an expansive game as well as put pressure on Samoa.
"I think we lacked a bit of belief [against Fiji] ... We've got to take the positives ahead and cut out the negatives. I believe we can do better. Against top sides like Fiji and Samoa they are going to punish you, they are dangerous runners. Hopefully we can force them to make mistakes."
Samoa have named the same team which beat Australia 32-23 in July for their opening World Cup match. However captain Mahonri Schwalger said they wouldn't be taking Namibia lightly.
"You're only as good as your last game. This is a World Cup and every game is important.
Samoan coach Titimaea Tafua said they were looking to focus on "one game at a time".
"We've prepared for our first game because it looks like all the teams in our pool - it's not an easy pool ... Namibia, they played well against the Fijians. [But] we are just focused about our game against Namibia."
Samoa's nippy little halfback Kahn Fotuali'i said it had been hard sitting back and watching all the other games but he couldn't wait to get on the field.
Kickoff is at 2.30pm with gate sales for the match still available.
Squads
Samoa: Sakaria Taulafo, Mahonri Schwalger (captain), Anthony Perenise, Daniel Leo, Kane Thompson, Taiasina Tuifua, Maurie Faasavalu, George Stowers, Kahn Fotuali'i, Tusi Pisi, Alesana Tuilagi, Seilala Mapusua, George Pisi, Sailosi Tagicakibau, Paul Williams; replacements, Ti'i Paulo, Census Johnston, Joe Tekori, Ofisa Treviranus, Junior Poluleuligaga, Eliota Sapolu Fuimaono, Tasesa Lavea.
Namibia: Johnnie Redelinghuys, Hugo Horn, Raoul Larson, Heinz Koll, Henk Franken, Jacques Nieuwenhuis, Jacques Burger (captian), Pieter Jan van Lill, Eugene Jantjies, Theuns Kotze, Llewellyn Winkler, Piet van Zyl, Danie van Wyk, Danie Dames, Chrysander Botha; replacements: Bertus O'Callaghan, Jane du Toit, Nico Esterhuyse, Rohan Kitshoff, Ryan de la Harpe, Darryl de la Harpe, TC Losper