Sebastian Vettel pointed out Lewis Hamilton’s experience behind the wheel of Ferrari.
Mercedes driver has long been linked with a move to Ferrari and speculation continues after the season-ending Abu Dhabi Grand Prix win.
"I think he's already a Ferrari driver. No? So no change," Vettel joked. "I think he's a good customer. He owns more than one."
Vettel has also been linked with retirement after a disappointing 2019.
"I was already doing holiday next year, I heard before I'm stopping," Vettel said. "I don't know who was the one [to start the speculation], seems to know more than me, but since you journalists are always right, then it will hit me in the next weeks.
"I've had a couple of mistakes that I shouldn't make. I have to be honest, obviously in terms of approach, maybe small things I can do. Less interviews will help! It's all part of the negotiations for next year before any other negotiations."