Formula One's record 22 race calendar for 2014 is 'beyond the limit' for teams but looks likely to be trimmed before it becomes definitive, according to Red Bull team principal Christian Horner.
McLaren will start the Formula One season without a title sponsor but still expect to have one this year, group chief executive Ron Dennis said.
McLaren's new Formula One car made a belated but encouraging test debut on Wednesday with Jenson Button hopeful the team was picking up speed on and off the track after a dismal 2013 season.
Formula One has lost another of its principals.