Red Bull design guru Newey to quit over Horner controversy

Adrian Newey, widely regarded as the greatest Formula 1 designer and a chief architect of Red Bull’s title dominance, is set to leave the world champions in the aftermath of the Christian Horner controversy, media reports claimed Thursday.

Newey, 65, has been with Red Bull since 2005 and has played a key role in all of the team’s 13 world titles — seven drivers and six constructors…