Motor racing-Setup change on Hamilton's car backfired, Wolff says

Russell was sixth fastest in the second free-practice session. Wolff said engineers had experimented with two different setups in the cars as the team tries to unlock performance amid a difficult start to the season.

Mercedes boss Toto Wolff said Lewis Hamilton's struggles in the second free-practice session at the Australian Grand Prix on Friday were because of a botched setup change on his car.

Seven-time world champion Hamilton cut a gloomy figure in the Mercedes garage after posting the 18th fastest lap in the session, more than 1.5 seconds slower than Ferrari's pace-setting Charles Leclerc at Albert Park. Hamilton was ninth quickest in the earlier session, while teammate George Russell was third. Russell was sixth fastest in the second free practice session.

Wolff said engineers had experimented with two different setups in the cars as the team tried to unlock performance amid a difficult start to the season. "In the second session (we’ve) gone through a quite dramatic setup change on Lewis' (car) and that has massively backfired," he told Sky. "But this is why we're having those sessions. On the other side, it was a bit better, but we were lacking performance. ... Overall it wasn’t a good day."

Both Hamilton and Russell struggled with the balance of their cars and each skidded off track in practice. They were hardly alone, though, with most drivers battling for grip on the street circuit, including Alex Albon, who wrecked his Williams car with a crash at turn six in the first practice.

Mercedes are fourth in the constructors' championship behind leading Red Bull, Ferrari and McLaren after the opening races in Bahrain and Saudi Arabia. "If I would say that I’m not frustrated, it would be not the truth," Wolff said of the W15 car's progress. "Certainly we are because we’re trying so much in all directions, but don’t seem to have found that silver bullet yet which helps us to get us in the right direction."

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