Will Power opened this weekend's Firestone Twin 275s IZOD IndyCar Series doubleheader by topping the opening practice session at Texas Motor Speedway.
The Penske driver produced a best lap at an average speed of 214.997mph early on and was never beaten, although team-mate Ryan Briscoe came close when he unloaded a 214.836mph in the final minutes to consign Dale Coyne Racing's Alex Lloyd to third.
JR Hildebrand claimed fourth place for Panther, leaving Dario Franchitti as first of the Ganassi drivers in fifth place with a 214.025mph lap.
The afternoon passed mostly without incident; the session being interrupted just once for a brief yellow flag for a track inspection.
Qualifying for the first of tomorrow's races will take place later today, with the grid for the second race to be determined by random draw.
Pos Driver Team Time Gap
1. Will Power Penske 24.3654s
2. Ryan Briscoe Penske 24.3814s + 0.0160s
3. Alex Lloyd Dale Coyne 24.4394s + 0.0740s
4. JR Hildebrand Panther 24.4413s + 0.0759s
5. Dario Franchitti Ganassi 24.4738s + 0.1084s
6. Ed Carpenter Sarah Fisher 24.4757s + 0.1103s
7. Alex Tagliani Sam Schmidt 24.4770s + 0.1116s
8. Tony Kanaan KV 24.5129s + 0.1475s
9. Helio Castroneves Penske 24.5162s + 0.1508s
10. Justin Wilson Dreyer & Reinbold 24.5364s + 0.1710s
11. Takuma Sato KV 24.5428s + 0.1774s
12. Graham Rahal Ganassi 24.5591s + 0.1937s
13. Scott Dixon Ganassi 24.5696s + 0.2042s
14. Danica Patrick Andretti 24.5853s + 0.2199s
15. Simona de Silvestro HVM 24.6015s + 0.2361s
16. Marco Andretti Andretti 24.6135s + 0.2481s
17. Davey Hamilton Dreyer & Reinbold 24.6186s + 0.2532s
18. Ana Beatriz Dreyer & Reinbold 24.6226s + 0.2572s
19. Charlie Kimball Ganassi 24.6270s + 0.2616s
20. Wade Cunningham Sam Schmidt 24.6302s + 0.2648s
21. Vitor Meira AJ Foyt 24.6486s + 0.2832s
22. Oriol Servia Newman/Haas 24.6529s + 0.2875s
23. James Hinchcliffe Newman/Haas 24.6648s + 0.2994s
24. EJ Viso KV 24.6997s + 0.3343s
25. James Jakes Dale Coyne 24.7176s + 0.3522s
26. Mike Conway Andretti 24.7219s + 0.3565s
27. Ryan Hunter-Reay Andretti 24.7230s + 0.3576s
28. Jay Howard Schmidt/Rahal 24.7398s + 0.3744s
29. Paul Tracy Dragon 24.7653s + 0.3999s
30. Sebastian Saavedra Conquest 24.9266s + 0.5612s