 On 16 September 2015, Rybalka made his UEFA Champions League debut in a 2–2 draw against Portuguese team FC Porto in the group stage, he assisted Dynamo's second goal which was scored by Vitaliy Buyalskyi on the 89th minute which gave Dynamo a draw.On 8 September 2017, Rybalka was loaned to Sivasspor, who had just returned to the Turkish Super League after a one-year absence.After a season on loan, Sivasspor bought Rybalka out of his Dynamo Kyiv contract, and signed him to a three-year deal.