Jonathan Rea is looking to overcome the 14 point deficit between him and Aprilia rider Max Biaggi, to take fourth place in the championship.
Last year saw Rea make his series debut at Portimao after being promoted from the Supersport squad early.
Finishing just off the podium on his debut, the Northern Irishman has been a revelation in 2009, winning two races to pretty much guarantee himself a top five championship finish.
“Last year, Portimao was my first race on a Ten Kate Honda Superbike and I really had a lot of fun. Although the track has quite a difficult layout, I really enjoy riding it and I’m looking forward to going back there.
“The bike is completely different to the one I rode last year and at the pre-season test, so we’ll be working from a much better starting point. Although it’s the final round, there’s still a chance for me to improve my overall position in the championship so we’ll be working really hard for that.
“Without a championship to challenge for, the last few races have really been about concentrating on building our speed and carrying that through into winter testing. I’m aiming for a fun end to the season and will be going for two more good finishes to end the year on a high.”