Max Verstappen a été le plus rapide de la première séance d’essais libres à Singapour. Il a devancé Sebastian Vettel et Lewis Hamilton. Valtteri Bottas est 4e et Alexander Albon est 5e. On retrouve également Nico Hulkenberg, les McLaren et les Toro Rosso dans le top 10.
| Pos | No | Pilote | Équipe | Temps | Écart | Tours |
|---|---|---|---|---|---|---|
| 1 | 33 | Max Verstappen | Red Bull Racing Honda | 1:40.259 | 22 | |
| 2 | 5 | Sebastian Vettel | Ferrari | 1:40.426 | +0.167s | 23 |
| 3 | 44 | Lewis Hamilton | Mercedes | 1:40.925 | +0.666s | 26 |
| 4 | 77 | Valtteri Bottas | Mercedes | 1:41.336 | +1.077s | 14 |
| 5 | 23 | Alexander Albon | Red Bull Racing Honda | 1:41.467 | +1.208s | 24 |
| 6 | 27 | Nico Hulkenberg | Renault | 1:41.812 | +1.553s | 26 |
| 7 | 55 | Carlos Sainz | McLaren Renault | 1:41.966 | +1.707s | 20 |
| 8 | 4 | Lando Norris | McLaren Renault | 1:42.180 | +1.921s | 19 |
| 9 | 26 | Daniil Kvyat | Scuderia Toro Rosso Honda | 1:42.305 | +2.046s | 26 |
| 10 | 10 | Pierre Gasly | Scuderia Toro Rosso Honda | 1:42.377 | +2.118s | 24 |
| 11 | 3 | Daniel Ricciardo | Renault | 1:42.527 | +2.268s | 20 |
| 12 | 8 | Romain Grosjean | Haas Ferrari | 1:42.630 | +2.371s | 23 |
| 13 | 99 | Antonio Giovinazzi | Alfa Romeo Racing Ferrari | 1:42.677 | +2.418s | 15 |
| 14 | 7 | Kimi Räikkönen | Alfa Romeo Racing Ferrari | 1:42.786 | +2.527s | 13 |
| 15 | 18 | Lance Stroll | Racing Point BWT Mercedes | 1:42.791 | +2.532s | 28 |
| 16 | 20 | Kevin Magnussen | Haas Ferrari | 1:43.150 | +2.891s | 22 |
| 17 | 88 | Robert Kubica | Williams Mercedes | 1:43.336 | +3.077s | 28 |
| 18 | 11 | Sergio Perez | Racing Point BWT Mercedes | 1:43.369 | +3.110s | 23 |
| 19 | 16 | Charles Leclerc | Ferrari | 1:43.618 | +3.359s | 12 |
| 20 | 63 | George Russell | Williams Mercedes | 1:43.993 | +3.734s | 2 |