Wolff expects increased Mercedes competition in 2020
Mercedes boss Toto Wolff feels the 2020 Formula 1 season could be "particularly challenging" for the defending champions.
The Silver Arrows claimed a sixth straight Constructors' and Drivers' Championship double last year as Lewis Hamilton landed the top prize.
However, Wolff feels the fact a host of regulation changes will come into force in the 2021 season will make the upcoming campaign more difficult for Mercedes.
"We all start with zero points again this year and we believe that 2020 will be particularly challenging because there will be teams that will put a lot of focus on 2020 and there will be teams that will start to shift their resources into 2021," he said, as reported by Grand Prix 247. "Getting that balance right will very important, but that's not an easy thing to do."
He added: "2020 is an evolution of the current regulations and the gains will be smaller, so you need more time and effort to keep improving your car. On the other hand, the 2021 regulations are so very different that you need to a lot of time to prepare for them.
"Every month you start later than your competitors [in planning for 2021] will make it more difficult to catch up."
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