After an encouraging Friday practice that saw both cars in the top ten the Williams Martini team would commence the final Saturday practice at the Sochi circuit. Both Williams cars would come out early for their installation lap, running on the medium tyre. They would both pit after the one lap Drivers would start to set times with Kvyat fastest from Sutil with a 1m:42.988. Vergne would go quickest with a 1m:42.600 with Vettel fourth. Perez was now third with a 1m:43.419 as Hamilton and Hulkenberg also took to the track. Rosberg would also come out as Hulkenberg went third, 1m:43.322. Hamilton would go fastest with a 1m:42.030 with Kvyat moving into second with a time of 1m:42.180.

Vettel's next lap would see a 1m:41.999 to go quickest but just as quickly Rosberg would go ahead with a 1m:41.859. Vettel was now second from Hamilton but he would improve to be quickest with a 1m:41.554. Hulkenberg would also improve with a 1m:42.193 to be fifth. Hamilton was also on a quicker lap setting a 1m:40.725 as Kvyat also improved with a 1m:41.291 to be second. Both McLaren's were now out on the track as Vettel pitted. Rosberg was also finding time setting a 1m:41.139 to move into second. Raikkonen and Grosjean were also out on the track as Hulkenberg lowered his time with a 1m:41.689 but remained fifth. Magnussen was now sixth with Kvyat also improving to be second with a 1m:40.960. But Rosberg would take this spot back with a 1m:40.831 as Button moved into sixth on his first timed lap. Perez was now seventh from Magnussen and Sutil.

Both Williams cars were out on the track for their first runs with just over forty minutes remaining. But the session would be red flagged when Magnussen would stop his car out on the track near Turn four after having a big moment with his car with what appeared to some type of failure with his car. He was able to bring his car to a stop without making contact with the wall but his car had to be pushed away by the marshals. The session would restart with Ricciardo and both Williams out first. Button and Alonso would follow them out along with a large number of other cars. We had Rosberg, Kvyat, Vettel, Perez, and Vergne out on the track. On their first laps Valtteri would move into tenth with a 1m:42.510 with Felipe sixteenth with a 1m:46.007. Hamilton was also out on the track as Valtteri moved into fifth with a time of 1m:41.275 on his next lap. Alonso was now fourth, 1m:41.058, while Felipe would improve to be eighth, 1m:42.159. But Felipe would drop down to ninth as Vergne took eighth.

Valtteri would go quickest in sector one and two. He would finish his lap with a 1m:40.655 to be quickest. Felipe would also improve to be sixth, 1m:41.357. Hamilton would improve the quicke4st first sector time while Ricciardo would improve ti be ninth, 1m:41.784. Both Williams drivers would pit after their first runs as Perez moved up to tenth, 1m:41.902. Both Williams cars would return after brief stops as Vergne improved to be seventh, 1m:41.545. Rosberg was on a quicker lap going fastest in sector two finishing his lap with a 1m:40.178 to go quickest. Vettel had moved ahead of Felipe to be sixth with Felipe now seventh. Valtteri would also find time setting a 1m:40.213. It was reported that both Williams cars had taken front wing changes on their stops. Valtteri would pit as Felipe also found time setting a 1m:40.446 to be third seeing Williams two-three in the times.

With sixteen minutes remaining the track would become empty as drivers returned to their pits to get ready for their qualifying simulations. First back out on the soft tyre would be Raikkonen and Button. Rosberg and Grosjean would also come out joined by more drivers. For Williams first out would be Valtteri as Raikkonen started his first quick lap on the soft tyre. Raikkonen would improve to be sixth, 1m:41.025, while Button would go fourth, 1m:40.707. Felipe would also come out as Rosberg went fastest in the final sector and Hamilton the first two. Hamilton would finish his lap setting a 1m:38.726 to be quickest as Hulkenberg went sixth with a 1m:40.669. Perez was now ninth as Valtteri started his flying lap. Ricciardo would improve to be fourth with a 1m:40.392 but Button would also pick up the pace on his second lap setting a 1m;40.355 to be fourth.

Valtteri would finish his lap setting a 1m:39.650 to be second. Felipe as third with a time fo 1m:39.998 but Rosberg would take this spot with a 1m:39.686. Felipe was now fourth followed by Kvyat, Raikkonen, Button, Ricciardo, Vettel, and Hulkenberg in tenth. Hamilton would pit after having set a quicker first sector time and having spun his car in the final turn. Ricciardo would move up to fifth with a time of 1m:40.007 with team-mate Vettel in ninth. Valtteri was able to find time on his last lap setting a 1m:39.097 to close the gap to Hamilton. But Rosberg would also find time moving into second with a time of 1m:39.016. Other drivers to find time would be Ricciardo who moved into fourth and Vergne who went eighth. With the end of the session the order was Hamilton from Rosberg, Valtteri, Ricciardo, Felipe, Kvyat, Raikkonen, Alonso, Vergne, Vettel, Button, Hulkenberg, Perez, Sutil, and Gutierrez fifteenth.

With the end of the session the Williams cars would finish third and fifth with both cars in the 1m:39s bracket. But they were still a considerable margin behind Hamilton. But encouragingly was the fact that they were very close to the second Mercedes of Rosberg. Several drivers, including the Williams, had been able to get quicker and quicker despite putting more laps on the option tyre so it would be interesting to see how the first period of qualifying turns out.

Pos  Driver             Team		        Time     Laps
1 Lewis Hamilton 	Mercedes 		1m38.726s 15 
2 Nico Rosberg 		Mercedes 		1m39.016s 25 
3 Valtteri Bottas 	Williams-Mercedes 	1m39.097s 20 
4 Daniel Ricciardo 	Red Bull-Renault 	1m39.755s 16 
5 Felipe Massa 		Williams-Mercedes 	1m39.954s 22 
6 Daniil Kvyat 		Toro Rosso-Renault 	1m40.009s 27 
7 Kimi Raikkonen 	Ferrari 		1m40.011s 20 
8 Fernando Alonso 	Ferrari 		1m40.151s 15 
9 Jean-Eric Vergne 	Toro Rosso-Renault 	1m40.205s 26 
10 Sebastian Vettel 	Red Bull-Renault 	1m40.338s 21 
11 Jenson Button 	McLaren-Mercedes 	1m40.355s 19 
12 Nico Hulkenberg 	Force India-Mercedes 	1m40.669s 23 
13 Sergio Perez 	Force India-Mercedes 	1m40.699s 26 
14 Adrian Sutil 	Sauber-Ferrari 		1m41.146s 21 
15 Esteban Gutierrez 	Sauber-Ferrari 		1m41.520s 20 
16 Romain Grosjean 	Lotus-Renault 		1m41.915s 22 
17 Kevin Magnussen 	McLaren-Mercedes 	1m42.436s 4 
18 Marcus Ericsson 	Caterham-Renault 	1m43.109s 11 
19 Kamui Kobayashi 	Caterham-Renault 	1m43.975s 12 
20 Max Chilton 		Marussia-Ferrari 	1m44.737s 9 
- Pastor Maldonado 	Lotus-Renault 		- - 	  2