Wins first race to seal title, while Tarquini takes second race.
Tiago Monteiro fought for every one of the 18 laps in the two races at the Spa-circuit.
Tom Coronel battles for what he is worth and scores valuable world championship points.
Muller holds on for Race One victory.
'Notoriously fickle microclimate' may be a factor
Unanimously considered the most beautiful circuit in the world, Spa-Francorchamps will host the last European leg of the FIA WTCC 2014.
The four Civics running in this season's WTCC proved highly competitive this weekend.
José-María López was the other star of the day’s proceedings, winning race 1 after starting from pole.
Ma Qing Hua has shocked the WTCC world and done Citroen proud.
The two Honda Civics battled through the three qualifying sessions, setting the times for others to challenge.
Rounds 11 and 12 of the FIA World Touring Car Championship (WTCC) take place tomorrow.