V prvom voľnom tréningu na Veľkú cenu Monaka bol najrýchlejší jazdec tímu BrawnGP Rubens Barrichello. Ferrari Felipeho Massu stratilo na Brawn len 0,310 s, tretí je Lewis Hamilton na McLarene.
Výsledky 1. tréningu na VC Monaka:
| 1 | Rubens Barrichello | Brawn-Mercedes | 1:17,189 | - | 26 | |
| 2 | Felipe Massa | Ferrari | 1:17,499 | + 0,310 | 31 | |
| 3 | Lewis Hamilton | McLaren-Mercedes | 1:17,578 | + 0,389 | 26 | |
| 4 | Heikki Kovalainen | McLaren-Mercedes | 1:17,686 | + 0,497 | 30 | |
| 5 | Kimi Räikkönen | Ferrari | 1:17,839 | + 0,650 | 30 | |
| 6 | Kazuki Nakajima | Williams-Toyota | 1:18,000 | + 0,811 | 29 | |
| 7 | Nico Rosberg | Williams-Toyota | 1:18,024 | + 0,835 | 27 | |
| 8 | Jenson Button | Brawn-Mercedes | 1:18,080 | + 0,891 | 28 | |
| 9 | Fernando Alonso | Renault | 1:18,283 | + 1,094 | 31 | |
| 10 | Mark Webber | Red Bull-Renault | 1:18,348 | + 1,159 | 22 | |
| 11 | Sébastien Buemi | Toro Rosso-Ferrari | 1:18,695 | + 1,506 | 37 | |
| 12 | Nelson Piquet | Renault | 1:19,204 | + 2,015 | 36 | |
| 13 | Sebastian Vettel | Red Bull-Renault | 1:19,233 | + 2,044 | 16 | |
| 14 | Sébastien Bourdais | Toro Rosso-Ferrari | 1:19,255 | + 2,066 | 31 | |
| 15 | Giancarlo Fisichella | Force India-Mercedes | 1:19,534 | + 2,345 | 28 | |
| 16 | Robert Kubica | BMW Sauber | 1:19,560 | + 2,371 | 20 | |
| 17 | Nick Heidfeld | BMW Sauber | 1:19,579 | + 2,390 | 23 | |
| 18 | Adrian Sutil | Force India-Mercedes | 1:19,600 | + 2,411 | 24 | |
| 19 | Timo Glock | Toyota | 1:19,698 | + 2,509 | 24 | |
| 20 | Jarno Trulli | Toyota | 1:19,831 | + 2,642 | 28 |
