I thought I would do my annual testing leaderboard of all every drivers 1st test fastest lap time to try & give some kind of sense in secrecy. it obviously fuel load can still affect this
Hard (C1) > (C2) > (C3) > (C4) > (C5) Soft
1) Hulkenburg (C5) 1:17.393 - day 4
2) Albon (C5) 1:17.637 - day 4
3) Kyvat (C5) 1:17.704 - day 3
4) Raikkonen (C5) 1:17.762 - day 3
5) Riccardio (C5) 1:17.785 - day 4
6) Bottas (C5) 1:17.857 - day 4
7) Hamilton (C4) 1:17.977 - day 4
8) Leclerc (C3) 1:18.046 - day 4
9) Vettel (C3) 1:18.161 - day 1
10) Norris (C4) 1:18.431- day 4
11) Giovinazzi (C3) 1:18.511 - day 4
12) Sainz (C4) 1:18.558 - day 1
13) Grosjean (C3) 1:18.563 - day 4
14) Magnussen (C3) 1:18.720 - day 4
15) Gasly (C3) 1:18.780 - day 4
16) Verstappen (C3) 1:18.787 - day 3
17) Fittipaldi (C4) 1:19.249 - day 3
18) Stroll (C2) 1:19.664 - day 4
19) Perez (C3) 1:19.944 - day 1
20) Russell (C3) 1:20.997 - day 4
21) Kubica (C2) 1:21.542 - day 4