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Marc Marquez mendominasi sesi kualifikasi MotoGP Australia 2018 dan itu merupakan pole MotoGP kelima berturut – turut di Phillip Island.
Marquez membuat catatan terbaiknya dengan 1 m 29.199 detik meninggalkan para pesaingnya dari Yamaha Maverick Vinales dan Johann Zarco. Berikut hasil lengkap kualifikasi MotoGP Australia 2018:
| POS | RIDER | TEAM | BIKE | TIME | GAP | LAPS |
|---|---|---|---|---|---|---|
| 1 | Marc Marquez | Honda | Honda | 1m29.199s | – | 9 |
| 2 | Maverick Vinales | Yamaha | Yamaha | 1m29.509s | 0.310s | 9 |
| 3 | Johann Zarco | Tech3 Yamaha | Yamaha | 1m29.705s | 0.506s | 8 |
| 4 | Andrea Iannone | Suzuki | Suzuki | 1m29.712s | 0.513s | 9 |
| 5 | Alex Rins | Suzuki | Suzuki | 1m30.026s | 0.827s | 9 |
| 6 | Jack Miller | Pramac Ducati | Ducati | 1m30.140s | 0.941s | 9 |
| 7 | Valentino Rossi | Yamaha | Yamaha | 1m30.270s | 1.071s | 9 |
| 8 | Danilo Petrucci | Pramac Ducati | Ducati | 1m30.328s | 1.129s | 9 |
| 9 | Andrea Dovizioso | Ducati | Ducati | 1m30.519s | 1.320s | 7 |
| 10 | Hafizh Syahrin | Tech3 Yamaha | Yamaha | 1m30.593s | 1.394s | 8 |
| 11 | Pol Espargaro | KTM | KTM | 1m30.640s | 1.441s | 7 |
| 12 | Alvaro Bautista | Ducati | Ducati | 1m32.367s | 3.168s | 3 |