Jenson Button made a promising, if not perfect, return to Formula One when he wound up 12th at the end of practice for the Monaco Grand Prix.
Teams have been told to change the rear jack points for safety reasons after recent Formula Four accident.
Lewis Hamilton lapped faster than ever at Monaco but championship rival Sebastian Vettel was not far behind.
'If you clip your front wing, it could take it off and it will fly you straight into the wall' - Romain Grosjean
Tributes have poured in for Nicky Hayden after the former MotoGP champion succumbed to his injuries on Monday night.
Jenson Button says he feels no pressure ahead of his one-off Formula One comeback with McLaren in Monaco this weekend.
All Formula One teams could eventually have their own virtual counterpart, says McLaren executive director Zak Brown.
There is still some debate about what three jewels actually feature in a crown only ever worn by one man.