The race was officially confirmed as the first of 21 scheduled rounds for the 2018 season during an FIA World Motor Sport Council meeting in December 2017. Pirelli provided three dry tyre compounds for the event: the purple-banded ultrasoft, red-banded supersoft, and yellow-banded soft. For the first time, race officials included a third drag reduction system (DRS) zone, with a detection point approaching the turns 11 and 12 chicane and an activation point on the exit of turn 12.
The 2018 Australian Grand Prix marked the competitive debut of the "halo" cockpit protection device. The wishbone-shaped frame was introduced following major accidents in open-wheel racing, including the death of Henry Surtees in 2009 and a head injury sustained by Felipe Massa at the 2007 Hungaroring. To address visibility concerns regarding the starting lights, the FIA lowered the starting gantries at the circuit.
The grid featured two debutants: reigning Formula 2 champion Charles Leclerc, who joined Sauber to replace Pascal Wehrlein, and Sergey Sirotkin, who replaced the retired Felipe Massa at Williams. Additionally, the race was the first since the 1982 San Marino Grand Prix to be contested without a Brazilian driver.
Three practice sessions were held, with Lewis Hamilton leading the first two Friday sessions. The third session on Saturday was affected by thunderstorms, resulting in a saturated track; Sebastian Vettel set the fastest time as the surface dried. During practice, Daniel Ricciardo received a three-place grid penalty for failing to stay above the minimum time under red flag conditions.
Qualifying saw Lewis Hamilton secure his seventh pole position in Australia, surpassing the record previously held by Ayrton Senna. Hamilton's pole lap of 1 minute and 21.164 seconds set a new circuit record. Kimi Räikkönen qualified second, while Vettel took third following a driving error at turn 13. The session was interrupted in Q3 by a heavy 27 g impact involving Valtteri Bottas, who spun into the barrier at turn two. Bottas was cleared by medical staff but received a five-place grid penalty for a damaged gearbox.
Before the start, the main straight of the Albert Park circuit was officially named the Walker Straight in honor of the late promoter Ron Walker. At the start, the top three positions remained unchanged, though Max Verstappen lost a place to Kevin Magnussen. Sergey Sirotkin became the first retirement on lap 4 due to a brake failure caused by a plastic bag entering his brake duct.
The race's outcome was determined by a series of pit stop incidents. On lap 24, Romain Grosjean retired from seventh place immediately after a pit stop due to a loosely fitted wheel-nut—the same issue that had forced his teammate Magnussen out two laps earlier. The resulting Virtual Safety Car (VSC) allowed Sebastian Vettel, who had not yet pitted, to change tyres and emerge ahead of Hamilton and Räikkönen. A software glitch caused Mercedes to miscalculate the gap required to prevent Vettel from jumping Hamilton under the VSC.
A full-course Safety Car was deployed on lap 27 and withdrawn at the end of lap 31. Vettel maintained the lead for the remainder of the race, successfully defending against Hamilton to win the Australian Grand Prix for the second consecutive year. Kimi Räikkönen finished third, holding off Daniel Ricciardo, who set the fastest lap of the race.
Vettel's victory made him the defending winner of the event and marked a significant milestone as his 100th podium. Fernando Alonso finished fifth for McLaren, resisting pressure from Verstappen. Daniel Ricciardo’s fourth-place finish equaled the best result for an Australian driver at their home Grand Prix, matching his own 2016 performance and Mark Webber's 2012 result.
Renault achieved its first double-points finish since the 2011 Turkish Grand Prix, with Nico Hülkenberg and Carlos Sainz Jr. finishing seventh and tenth respectively. Following the race, the Haas team was fined €10,000 by the FIA for the unsafe release of both cars during their pit stops. The event concluded with Vettel leading the Drivers' Championship with 25 points, followed by Hamilton with 18 and Räikkönen with 15.
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