Graham Rahal jumped to the top of the timesheets as the chequered flag came out at the end of the final practice session for the Indy 225 on Saturday afternoon ahead of qualifying.

Rahal's time of 21.7008s was 0.1223s ahead of Dario Franchitti who saw off a strong challenge from James Hinchcliffe. All three drivers had opted not to come out on track until the very last minutes because of the condition of the track, which had suffered with inferior rubber laid down by the American-Canadian Tour stock car support race. Mike Conway even decided that the track condition was so bad it was safer not to go out at all.

That rubber build-up affected grip and may have contributed to a heavy crash for Pippa Mann which put her into the wall hard out of turn 2. Mann - who had been delayed by an engine change following her spin in the morning session - lost the rear end of the #30 and hurtled barkwards into the concrete wall outside of the SAFER barrier area.

That triggered a full-course caution while Mann was tended to and the car recovered. She was able to walk away from the car but appeared to have some injury to her left leg or ankle as she did so, and was subsequently placed on a stretcher for treatment. She was dispatched to the local hospital by ambulance for further evaluation.

The lengthy caution meant that organisers extended the practice session, which had already been reconfigured from the two thirty-minute-group format which would have seen half the field on track at a time to alleviate traffic overcrowding problems. That format was relaxed after the first group found the state of the track compromised from the support race, and as a result the second group only got exclusive use of the circuit for the final ten minutes which is when Rahal, Franchitti and Hinchcliffe set the fastest times as the conditions finally started to improve again.

Qualifying for Sunday's Indy 225 race is on Saturday at 3pm local time (8pm BST). The qualifying format will be back to 'oval'-style qualifying with each car running alone on track, with three warm-up laps followed by two fast laps and the qualifying position set according to the total time/averaged speed of those two flying laps.

Practice 4

1. #38 Graham Rahal 170.040mph 21.7008s after 19 laps
2. #10 Dario Franchitti 169.087mph 21.8231s + 0.1223s after 16 laps
3. #06 James Hinchcliffe 167.226mph 22.0659s + 0.3651s after 7 laps
4. #5 Takuma Sato 166.540mph 22.1568s + 0.4560s after 9 laps
5. #6 Ryan Briscoe 166.070mph 22.2196s + 0.5188s after 29 laps
6. #9 Scott Dixon 165.543mph 22.2903s + 0.5895s after 49 laps
7. #3 Helio Castroneves 165.540mph 22.2907s + 0.5899s after 34 laps
8. #83 Charlie Kimball 165.214mph 22.3347s + 0.6339s after 12 laps
9. #4 JR Hildebrand 164.765mph 22.3956s + 0.6948s after 26 laps
10. #77 Alex Tagliani 164.671mph 22.4083s + 0.7075s after 16 laps
11. #82 Tony Kanaan 164.261mph 22.4642s + 0.7634s after 13 laps
12. #14 Vitor Meira 163.649mph 22.5482s + 0.8474s after 44 laps
13. #28 Ryan Hunter-Reay 163.331mph 22.5921s + 0.8913s after 15 laps
14. #19 Alex Lloyd 162.610mph 22.6924s + 0.9916s after 46 laps
15. #18 James Jakes 162.559mph 22.6995s + 0.9987s after 42 laps
16. #12 Will Power 161.951mph 22.7847s + 1.0839s after 38 laps
17. #26 Marco Andretti 160.625mph 22.9727s + 1.2719s after 37 laps
18. #24 Ana Beatriz 160.593mph 22.9774s + 1.2766s after 32 laps
19. #7 Danica Patrick 159.851mph 23.0840s + 1.3832s after 23 laps
20. #22 Tomas Scheckter 158.954mph 23.2143s + 1.5135s after 47 laps
21. #30 Pippa Mann 155.399mph 23.7453s + 2.0445s after 11 laps
22. #59 EJ Viso 155.287mph 23.7625s + 2.0617s after 38 laps
23. #34 Sebastian Saavedra 154.496mph 23.8841s + 2.1833s after 35 laps
24. #78 Simona de Silvestro 154.197mph 23.9304s + 2.2296s after 33 laps
25. #67 Ed Carpenter 151.532mph 24.3513s + 2.6505s after 29 laps
26. #2 Oriol Servia 128.754mph 28.6593s + 6.9585s after 5 laps
27. #27 Mike Conway No time after 0 laps

Total Laps: 705