Nico Hulkenberg says that not all the decisions he made during his career were perfect, but his move from Force India to Sauber at the end of 2012 was in hindsight the wrong choice.
Hulkenberg transferred to the Hinwil-based squad for 2013 after just a single season with Force India and after his second year in F1.
Racing at Sauber alongside rookie Esteban Gutierrez, Hulkenberg endured a difficult campaign although results improved in the second half of his season.
"Not all the moves were right or perfect, that's the difficult thing in Formula 1," Hulkenberg said, quoted by GP Today.
"You take a decision six or eight months before you get there and it's difficult to predict where things turn out.
"It's easy to say, but I think that change to Sauber in 2013, even though it was a much better half of the season, I think that move was probably not the best for my career."
The German driver returned to Force India for 2014 to spend three seasons alongside Sergio Perez at the Silverstone-based outfit before answering Renault's call for 2017.
Unfortunately, the man who holds the unenviable record for the most race starts in F1 without achieving a podium finish will be sitting on the sidelines in 2020, replaced at Renault by F1 returnee Esteban Ocon.
"Obviously, they still have a big challenge on their hands," Hulkenberg said, commenting on his former team's prospects.
"With 21 in mind a lot of things change and with 2020 they want to progress and get up the grid.
"This year  was not a setback, but not the year we wanted and needed. So, they have that challenge on their hands to bounce back from that and do better next year.
"There is going to be an interesting challenge and time ahead for them, but I wish them luck and all the best."