| BEST TIMES DAY 4 | |||
| Driver | Team | Compound | LapTime |
| Raikkonen | Ferrari | SOFT | 01:20,872 |
| Verstappen | Red Bull | SOFT | 01:21,769 |
| Palmer | Renault | SOFT | 01:21,778 |
| Grosjean | Haas | MEDIUM | 01:22,309 |
| Giovinazzi | Sauber | ULTRASOFT | 01:22,401 |
| Perez | Force India | SUPERSOFT | 01:22,534 |
| Vandoorne | McLaren | ULTRASOFT | 01:22,576 |
| Bottas | Mercedes | SOFT | 01:23,443 |
| Hulkenberg | Renault | SOFT | 01:24,974 |
Barcelona pre-season test: full lap time summary of Week 1
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