Bitsakis made his official debut at the 2000 Summer Olympics in Sydney. He failed to reach the top 16 in the 100 m freestyle, finishing in a thirty-fourth place tie with Kyrgyzstan's Sergey Ashihmin at 51.28. He also placed fifteenth, along with Athanasios Oikonomou, Spyridon Gianniotis, and Dimitrios Manganas, in the 4 × 200 m freestyle relay (7:35.77).