Jahor Herassimau mainly plays on the ATP Challenger Tour and the ITF Future Tour . So far he has celebrated two single and four double victories on the Future Tour as well as one double victory on the Challenger Tour. On August 18, 2014, he broke through the top 200 of the world rankings in singles for the first time and his highest ranking was a 164th place in February 2016. He made his debut in singles on the ATP World Tour in September 2014 at the Shenzhen Open , where he was already lost in the opening round against Thanasi Kokkinakis in straight sets.
Jahor Herassimau has been playing for the Belarusian Davis Cup team since 2013 . For this he competed in three encounters, with a balance of 3: 2 in singles and 1: 0 in doubles.