Reigning World Champion Lewis Hamilton clocked the quickest time during the final practice session for the Belgian Grand Prix.
Hamilton posted a 1:48.984 on Option tyres to finish the session 0.498s clear of Mercedes team-mate Nico Rosberg.
Ferrari emerged as Mercedes' primary challenger with Sebastian Vettel and Kimi Raikkonen in third and fourth.
Sergio Perez placed a strong fifth for Force India, ahead of Daniel Ricciardo and Daniil Kvyat, who both conducted their Option tyre runs earlier in the session than their rivals.
Nico Hulkenberg was eighth fastest while Williams completed the top 10 with Valtteri Bottas ahead of Felipe Massa.
Carlos Sainz Jr. was 11th, ahead of Pastor Maldonado, Max Verstappen and Sauber pair Felipe Nasr and Marcus Ericsson.
Romain Grosjean was only 16th after being compromised by Raikkonen on the exit of Stavelot, while Jenson Button was 17th.
Manor Marussia claimed 18th and 19th courtesy of Will Stevens and Roberto Merhi, the pair separated by just a couple of hundredths of a second.
Fernando Alonso managed just a solitary installation lap before McLaren was forced to change his exhaust, ruling him out of the rest of the session. The Spaniard is set to start from the back of the grid due to engine penalties.