Haas team boss Guenther Steiner has warned the aerodynamic changes made for 2019 shouldn't be judged by the Australian Grand Prix.
It was a poor season-opener last year which led to action and the eventual implementation of the new wider and simpler wings for this year with the aim of reducing the impact of turbulent air.
Until now reactions have been mixed with several drivers, including Haas' own Kevin Magnussen, reporting an improvement behind the wheel, however, a first indication will come on Sunday.
“The aim of the regulation change was to make passing easier, but the proof is in the pudding," Steiner declared. “We’ll only really see after three or four races how it works out.
“Australia, in general, is a very difficult track to pass at – probably one of the most difficult ones. If it doesn’t work there, we shouldn’t jump to the conclusion that it will not work for the whole year.
“We need to see if it works or not, and you only really find these things out in race situations.”
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It's likely Albert Park will again feature three DRS zones heading to Turns 1, 3 and 13 with the effect of the rear wing one of the most talked about parts of testing.
The Pirelli tyres will also be a factor, although low-degradation one-stop races are expected in 2019 because, for some reason, people think strategies are no longer important.
