With both Ferrari and Mercedes holding a significant power advantage of Red Bull, Verstappen has not found himself amongst the race victories so far this season, instead solidly picking up points in every race, including via two podium spots.
Rosberg thinks that, with the car he has, the Dutchman has been perfection this campaign.
"The Max Verstappen season is perfect,” the FInn said.
“After Lewis, he is the best driver on the current grid. He gets the maximum out of the car and grabs the maximum number of points that can be achieved with the RB15.
"So a perfect season, which he also shows today. More than P4 is simply not available at the moment."
Looking to the championship as a whole, Rosberg believes Vettel’s bid is over, and that Bottas is the only real challenger to Hamilton.
“Vettel no longer has a chance, so that leaves only Bottas,” he suggested.
“And we all know that it will be difficult. Lewis simply has the best chances to win the title. His sixth: Incredible! And then Mercedes, which is going to win the sixth manufacturer's title. We have never seen that in Formula 1!"
After eight races, Hamilton is 87 points ahead of Verstappen in the title rankings.
GPFans is a multi-platform, multi-language brand dedicated to Formula One coverage. We bring you all the ins and outs of the sport, 24/7, everything from up-to-the-minute news and features to the latest viral stories and clips.
We believe that a new generation of exciting, outspoken drivers will make F1 more popular than ever before, and we want to give our users access to as much of their heroes as possible, on and off the track. From Lewis Hamilton to Max Verstappen, Daniel Ricciardo to Sebastian Vettel, we provide in-depth analysis of every every Grand Prix in the season, from Australia to Abu Dhabi.
With Formula One under the new ownership of Liberty Media, how the sport is being covered is evolving, and GPFans will look to be at the heart of this progression into new media, as one of the fastest-growing sites covering the king of motorsports.