"The level playing field and the integrity of the single market is a very important issue for us, it means we will have to discuss, to negotiate with our partner [the UK] and see how it is possible to give this very important guarantee for the future," the new European Council president said.
Asked whether a Brexit deal can be reached within the course of the next 12 months, Michel chose not to make predictions.
"Regarding Brexit, it’s not my intention to predict based on the experience of the past but I hope that we will be able to work very hard with the British government [to ensure security and stability for UK citizens and companies]," he said.
Michel added that he hoped to have "loyal negotiations" with the UK to reach an agreement.
With 649 of 650 constituencies having declared their results, Boris Johnson’s Conservative Party has secured a comprehensive election victory, which many have attributed to his rhetoric of completing Brexit.
UK Prime Minister Boris Johnson, speaking after election victory on Friday, vowed to "get Brexit done" by 31 January 2020.