Kevin Magnussen believes that Jenson Button has the entire package to remain the best team-mate he has ever had in Formula 1, but there is no doubt in his mind that Romain Grosjean is a faster driver than the 2009 world champion.
The 2019 F1 grid has experienced a major shake-up with nearly every team making at least one driver change, but Haas has opted for consistency rather than chance, with Magnussen and Grosjean set to partner each other again after a productive 2018 in which the team finished fifth in the constructor's championship.
Magnussen, commenting on his chemistry with Grosjean, reckons Button, who was previously a team-mate at McLaren, has the upper-hand in that department, but believes the 32-year-old is quicker.
"If you look at the whole package - human, chemistry, laptimes and so on - Jenson is the best teammate I've had. But there is no doubt that Romain is faster than Jenson," Magnussen told BT newspaper.
"On one lap, Romain is exceptionally fast when it all goes well for him.
Grosjean's performances suffered in the first half of the campaign while Magnussen found consistency, but after the car was updated their fortunes switched which arguably saved the former's position within the team.
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.