Irish rally car legend Craig Breen was "more than just a driver, he was a true lover of the sport," said Hyundai Motorsport President Sean Kim following his shock death.
The Waterford man, 33, was killed when his car crashed during a pre-race test on the route near the town of Lobor in Croatia at around 11am on Thursday.
In an emotional tribute, Mr Kim said: "The reality of yesterday has still not sunk in, and it is unlikely to for a very long time.