Both denied any wrongdoing and were said to be in a romantic relationship (pictured after Rybakina's 2022 Wimbledon final win).
'The WTA confirms that the independent investigation into a potential breach of the WTA Code of Conduct by Stefano Vukov has concluded,' a statement read.
An independent investigation followed and the WTA has now confirmed the ban, despite Vukov pleading his innocence and Rybakina denying any mistreatment.
Women's tennis' governing body has indefinitely banned 2022 Wimbledon champion Elena Rybakina's former coach after accusing him of 'mental abuse' towards her.
The Croatian coach denied any abuse after a WTA letter reportedly accused him of doing so.