new Haas Formula One team would have offered former McLaren reserve Kevin Magnussen a race seat for 2016 if Frenchman Romain Grosjean had not accepted it.
Mercedes have warned triple Formula One world champion Lewis Hamilton and team mate Nico Rosberg to steer clear of controversy in the Mexican Grand Prix.
Jenson Button faces a record but meaningless 70 place grid penalty at the Mexican Formula One Grand Prix after problems with his McLaren's Honda power unit.