"It's Magnussen and da Costa," Frijns told AUTOSPORT of the likely contenders for the title. "They were always up there this year, and they are both really quick.
"The speed that Kevin has is impressive. And he always goes for the win. He's capable of dominating races.
"I think da Costa is similar, and he won a lot of races last year. I don't think there will be as many guys going for the title as there was this year, but the ones at the front will be really quick and that's good for the championship."
The 2015 Formula Renault 3.5 season will be notable for being the last with the French company's backing but also produced a worthy champion in Oliver Rowland. PETER MILLS evaluates this year's crop of drivers
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Landing the Fortec seat that took rising star Robin Frijns to the 2012 FR3.5 title was already a good sign for Stoffel Vandoorne. Then McLaren took him under its wing. Peter Mills tells Vandoorne's story so far