Lewis Hamilton has pulled out of a tyre test in Barcelona to rest a sore foot ahead of the US Grand Prix.
Former chief engineer says the F1 team is suffering from a "climate of fear" with staff reluctant to take risks.
Formula One championship leader pours scorn on suggestions that his Mercedes team-mate is losing it.
Lewis Hamilton will take the Formula One title race down to the wire, insists Mercedes boss Toto Wolff.
Rosberg could soon equal Schumacher and Vettel's record, but he knows how quickly fortunes can turn.
Max Verstappen once again found his driving the subject of discussion in the stewards office after the Japanese Grand Prix.
Nico Rosberg tightened his grip on the F1 title race with a dominant victory at the Japanese Grand Prix on Sunday.
Nico Rosberg stormed to pole position at the Japanese Grand Prix for a third successive year, piling more pressure on world champion Lewis Hamilton.
But Mercedes team mate and title rival Lewis Hamilton closes the gap to just 0.072s in the second session.
Rosberg sets the pace ahead of Hamilton as Mercedes dominates Friday's opening session of practice for the Japanese Grand Prix.
McLaren's engine supplier is expecting a happier homecoming at the circuit it owns than than at last year's Japanese Grand Prix.
Mercedes has identified the cause of the blow-up that forced Lewis Hamilton to retire while leading the Malaysian Grand Prix.
Daniel Ricciardo has promised to "kick ass" in Japan this weekend - and that could be bad news for Nico Rosberg.
Pots calling kettles black, predicted rain and pressure on Hamilton will likely make for an interesting F1 weekend.
Lewis Hamilton boarded a plane bound for Japan on Monday and had plenty of excess baggage in tow.