ALSO READ: Neeraj Dedicates Gold At Tokyo Olympics To Late Milkha Singh
During the build-up to the Olympics, Chopra had said that he was trying to throw the javelin flatter as the high projectile of the spear reduces the actual distance covered.
Asked about this, Bartonietz said, "The javelin should go far and not high. Most of the athletes at the Olympics threw the javelin high. It's not our business to correct them but yes it's the correct thing to try and throw flatter."
Chopra topped the qualification round ahead of German Johannes Vetter, who came to Tokyo as gold-medal favourite but finished ninth, and Bartonietz said winning a gold was never a realistic target.
"Depending on what the others do (in the final), there was a real chance to win a silver or bronze, but not gold. Nobody thought of gold," he said.
"When you are so much fixed with gold. If you think like I must win gold, I will win gold, then mostly this will not happen. If you are enjoying what you are doing, and if you are doing your best, medals or gold medal will come."
Chopra came up with big throws in his first attempt in both the qualification round and the final, and Bartonietz said that was always a part of the plan.
"It is his intention and logic also. You want to give a shock to your opponents and show them that I am the contender. Everybody would like to do this.
"You cannot save your best throw consciously till the end. You don't know whether you will make the first three."
Chopra took part in only thee international competitions before the Olympics and Bartonietz said the number of events will be more next year but there will no "overdoing".
Asked what is the ideal number of competitions before Olympics, he said, "Around six competitions. We had Portugal, Karlstad and Kuortane, we could have one in Sweden in Upsala but then we did not take part.
"Definitely, there was problem to get visa to England and there was this fear of you may have to go to quarantine as you came from India. He competed more than last year. Next year there will be more competitions but not overdoing."
Bartonietz said Chopra's season is over and the youngsters is not taking part in any competition this year, including in any remaining legs of the Diamond League.
"No, he has skipped it (Diamond League). His season is over. He needs training in the next two-three weeks. I will come back to India around the end of September or beginning of October."