Max Verstappen has said he will park the idea of replacing Lewis Hamilton at Mercedes until later in the year.
Seven-time world champion Hamilton has agreed a one-year contract extension, but Mercedes are having to consider life after their star driver, who will be 37 next year.
On Thursday, the Briton, who contracted Covid-19 in December, wrote on Instagram: "Emotionally and physically, this has been a challenging break. But the opportunity to get in the waves [surfing] has cleared my mind."
Following few rule changes, Mercedes are expected to remain the dominant force in 2021 ahead of a major overhaul of the sport's regulations next year.
Verstappen added: "We want to make it more difficult for Mercedes because they must be the favourites.
"We have made good steps with [engine supplier] Honda but the competition does not stand still so we have to wait and see if it is competitive enough to fight for wins.
"It is all looking promising but it makes no sense at the moment trying to hype it up.
"I am always very realistic and it makes no sense to talk about stuff now. We have to go to the first race in Bahrain and we will know if we have succeeded or not.
"I want to stay low-key and we should do the talking on the track, not next to the track. We know where we want to be, and where we want to get to, and that is what we have to now try to realise."
Testing for the new campaign gets under way in Bahrain on March 12 ahead of the curtain raiser, also in the Gulf Kingdom, a fortnight later.
