Is there 1 dinosaur still alive?

Could you please clarify for me, is there any credible scientific evidence to suggest that there is still a single dinosaur alive today? Given the vast amount of time that has passed since the extinction of dinosaurs, and the lack of any reported sightings or fossil records indicating their continued existence, it seems highly unlikely that any dinosaurs would still be alive. However, I'm open to hearing any new theories or discoveries that may challenge this assumption.