The Vitaphone Maserati No.1 of Andrea Bertolini and Michael Bartels won the Championship Race after a nail-biting finish in Portimao.
The Maserati held off the challenge of Richard Westbrook and Thomas Mutsch in the Matech Competition Ford GT No.5.
Westbrook produced a stunning drive to close a gap of over nine seconds to the Maserati with Bartels at the wheel after the driver change.
At the finish Bartels was able to hold Westbrook at bay by just 1.4 seconds in a gripping climax to the one-hour race.
Third place went to the Phoenix Crovette No.13 of Marc Hennerici and Alex Margaritas.
The pole-sitters, Michael Krumm and Peter Dumbreck in the Sumo Power Nissan GT-R No.23 finished fourth.
Daniel Keilwitz stormed through after the pitstops to secure his and Christian Hohenadel's fourth win of the season and secure the 2010 FIA GT3 European Championship driver's title. The Callaway Competition Corvette finished 6.6 seconds ahead of Paul Van Splunteren's Prospeed Competition Porsche, the round 9 winner narrowly missing out on the win after a collision with race leader Gael Lesoudier in the Marc VDS Ford GT on lap 24. Lesoudier recovered and briefly held third before being passed by Zak Brown in the United Autosports Audi R8 LMS from the USA on lap 31, the first podium finish for the team in the FIA GT3 European Championship.