The Amakhosi were knocked out of the Confederation Cup at the third round stage following a 5-2 aggregate defeat to Zambian champions Zesco United.
Chiefs faced AmaZulu on Wednesday evening, and before the first leg, they had a league clash with Bidvest Wits, something which did not sit well with the German-born coach.
“First of all compliment to Zesco. I think both games (they were good) six points. It was very clear. They deserve to qualify. We were not able to get the freshness in. We had our first game on the 5th of January," Middendorp told SuperSport TV.
“Now today is the 20th is 15 days and that means it's five games in 15 days. I don’t have to explain it and if you want to compete with the champions of other countries (we’ve to prepare better).
“First game away we had to do a very intensive game against Bidvest [Wits]. We won it. We went all out. Now here we are again we have to play another intensive game in Durban against AmaZulu, we won it.
“But I have seen the players in both games first game away and today’s game three days later after another intensive game we haven’t been able to get the freshness in."