Nico Rosberg has urged Lewis Hamilton to keep it clean in their Formula One world title showdown in Abu Dhabi on Sunday.
The warning came ahead of their end-of-season clash at the Yas Marina circuit being dubbed the 'Duel in the Desert'.
It was a reminder from Rosberg to Hamilton to play fair, despite the contentious issues that may have occurred between the duo over the course of the past few months.
In particular, Rosberg's manoeuvre in qualifying in Monaco when he appeared to make a mistake before reversing back on track, so ensuring himself of pole position in the process, has been deemed deliberate by many seasoned observers.
A few months later at the Belgian Grand Prix, Rosberg deliberately opted not to pull out of a crash with Hamilton who was later forced to retire from the race with damage sustained in the incident.
With Hamilton havinga 17-point lead over Rosberg, he could easily decide to take matters into his own hands, as has occasionally been the way in F1 in the past.
But Rosberg said: "Lewis can do something to keep it clean which is drive cleanly himself. It's not like he can't do anything."