Gene Haas has suggested Romain Grosjean has signed an extension for 2018 by saying his team will have an unchanged line-up next season.
Grosjean was joined by Dane Kevin Magnussen for Haas' second in Formula One, with the Dane signing a multi-year deal. Grosjean, who is out of contract at the end of the year, was the team's original signing ahead of its debut campaign in 2015 and has claimed the team's best results in his time with the team so far.
With one Mercedes and both Ferrari seats still yet to be confirmed for 2018 there is growing speculation about a busy driver market later this year.