Pada percobaan ketiga, Marquez mencatat waktu putaran 1 menit 33,066 detik dan memipin daftar sementara. Pada percobaan ketujuh, dia mempertajam waktu putarannya menjadi 1 menit 32,797 detik.
Tiga putaran kemudian, pebalap 21 tahun tersebut berhasil melaju lebih cepat dan mencatat waktu 1 menit 32,391 detik. Pol Espargaro menempel di urutan dua dengan catatan waktu 1 menit 32,929 detik.
Hingga sesi berakhir, tidak ada pebalap lain yang mampu melewati catatan waktu Marquez. Para pebalap kini bersiap untuk mengikuti sesi kualifikasi.
Hasil Sesi Latihan Bebas Keempat GP Indianapolis, Sabtu (9/8/2014):
1. Marc Marquez ESP Repsol Honda Team (RC213V) 1m 32.391s [Lap 10/14] 340km/h (Top Speed)
2. Pol Espargaro ESP Monster Yamaha Tech 3 (YZR-M1)* 1m 32.929s +0.538s [9/16] 342km/h
3. Valentino Rossi ITA Movistar Yamaha MotoGP (YZR-M1) 1m 32.974s +0.583s [15/17] 340km/h
4. Andrea Dovizioso ITA Ducati Team (Desmosedici) 1m 33.194s +0.803s [5/14] 343km/h
5. Jorge Lorenzo ESP Movistar Yamaha MotoGP (YZR-M1) 1m 33.297s +0.906s [13/15] 337km/h
6. Dani Pedrosa ESP Repsol Honda Team (RC213V) 1m 33.304s +0.913s [11/14] 349km/h
7. Stefan Bradl GER LCR Honda MotoGP (RC213V) 1m 33.322s +0.931s [13/17] 342km/h
8. Aleix Espargaro ESP NGM Forward Racing (Forward Yamaha) 1m 33.351s +0.960s [7/12] 332km/h
9. Andrea Iannone ITA Pramac Racing (Desmosedici) 1m 33.365s +0.974s [7/14] 341km/h
10. Bradley Smith GBR Monster Yamaha Tech 3 (YZR-M1) 1m 33.375s +0.984s [12/16] 339km/h
11. Yonny Hernandez COL Pramac Racing (Desmosedici) 1m 33.401s +1.010s [5/9] 340km/h
12. Scott Redding GBR Go&Fun Honda Gresini (RCV1000R)* 1m 33.677s +1.286s [8/9] 326km/h
13. Alvaro Bautista ESP Go&Fun Honda Gresini (RC213V) 1m 33.754s +1.363s [5/15] 348km/h
14. Danilo Petrucci ITA IodaRacing Project (ART) 1m 33.808s +1.417s [12/14] 328km/h
15. Cal Crutchlow GBR Ducati Team (Desmosedici) 1m 33.991s +1.600s [3/15] 342km/h
16. Hiroshi Aoyama JPN Drive M7 Aspar (RCV1000R) 1m 34.160s +1.769s [13/14] 328km/h
17. Leon Camier GBR Drive M7 Aspar (RCV1000R) 1m 34.574s +2.183s [13/16] 321km/h
18. Hector Barbera ESP Avintia Racing (Avintia) 1m 34.903s +2.512s [8/13] 323km/h
19. Broc Parkes AUS Paul Bird Motorsport (PBM-ART)* 1m 34.981s +2.590s [10/12] 323km/h
20. Mike Di Meglio FRA Avintia Racing (Avintia)* 1m 35.008s +2.617s [3/13] 325km/h
21. Karel Abraham CZE Cardion AB Motoracing (RCV1000R) 1m 35.012s +2.621s [3/8] 326km/h
22. Michael Laverty GBR Paul Bird Motorsport (PBM-ART) 1m 35.353s +2.962s [10/14] 325km/h
23. Colin Edwards USA NGM Forward Racing (Forward Yamaha) 1m 35.404s +3.013s [12/13] 330km/h
Fastest practice time:
Stefan Bradl GER Honda 1m 32.522s
Official Indianapolis MotoGP records:
Best lap:
Stefan Bradl GER Honda 1m 32.522s
Fastest race lap:
New circuit layout