RED Bull owner Dietrich Mateschitz is neither surprised nor disappointed about Sebastian Vettel’s departure and made no attempt to stop him going.

Mateschitz, 70, said that the team knew Vettel was in talks with other teams for 2015 and that he had a right to seek a new challenge.

In addition, the team will save a lot of money as Russian newcomer Daniil Kvyat will earn far less than the four-times reigning world champion, Mateschitz said in his first public comments on the issue.

Vettel informed Mateschitz via phone on October 3 and he and the team went public the next day with the news that he will leave Red Bull after six seasons despite a contract until 2016.

He joined Red Bull in 2009 from sister team Toro Rosso and they won four drivers’ and constructors’ titles in a row between 2010 and 2013.

The German is tipped to join Ferrari as Fernando Alonso appears set to leave the Italian team for McLaren.

“We knew that he was in talks, and I also believe that, despite all loyalty, it is right for a racing driver to seek a new challenge,” Mateschitz said.

He also acknowledged that Red Bull’s struggle this season with rule changes and the Renault power unit also contributed.

“We didn’t try (to make him stay), and I wouldn’t have considered it right. Especially under the current conditions,” he said.

“Confronted with Red Bull’s handicap with the current power unit you don’t need a four-times world champion who could at best be ‘best of the rest,’ given Mercedes’ current dominance.”

Mateschitz also said the promotion from Toro Rosso to Red Bull, just as Vettel and Daniel Ricciardo in the past, was “a huge upgrade” for the talented Kvyat.

“So we neither considered it just nor necessary to intervene, particularly because this switch also brings huge financial savings.

“I also believe that the upcoming switches will contribute a lot to excitement in the next Formula One season.”

Mateschitz dismissed critics who suggest that Vettel is running away after the first below-par season as people “who don’t really know how the Formula One circus works.”