Denys Petrovych Molchanov is a Ukrainian tennis player competing on the ATP Challenger Tour. He has won two ATP doubles titles. He has also won 15 ITF singles and 66 doubles titles, 36 of them Challengers. On 5 January 2015 he reached his highest ATP singles ranking of World No. 169, whilst his highest doubles ranking of No. 61 was reached on 30 October 2023. He also played for the Ukraine Davis Cup team.