He cleared a FINA A-standard entry time of 15:27.86 (400 m freestyle) from the European Championships in Helsinki, Finland.

Swimming in heat four, he rounded out the field to last place by almost ten seconds behind winner Massimiliano Rosolino of Italy in 3:55.26.

[3][4] Four days later, Koptur teamed up with Pavel Lagoun, Igor Koleda, and Valeryan Khuroshvili in the 4 × 200 m freestyle relay.

Swimming the third leg, Koptur recorded a split of 1:51.14, but the Belarusians fell short to sixth place and twelfth overall in a final time of 7:24.83.

[5][6] In his final event, 1500 m freestyle, Koptur challenged seven other swimmers in heat three, including top favorites Ricardo Monasterio of Venezuela and Spyridon Gianniotis of Greece.