The report said Mexican Esteban Gutierrez will be Hulkenberg’s teammate next year, leaving Kamui Kobayashi without a seat.
Kobayashi’s current teammate at Sauber, Sergio Perez, will be shifting to McLaren in 2013.
“Sauber have not yet officially confirmed Hulkenberg but the deal is understood already to be done,” said the report.
The report also claimed that former Force India driver Adrian Sutil is in the reckoning to be Hulkenberg’s replacement at the Silverstone-based team.
Hulkenberg battled through the 55-lap race to finish sixth in the Korean Grand Prix yesterday, pushing him to 12th spot in the drivers’ championship with 45 points from 16 rounds. Teammate Paul di Resta finished 12th.
When asked about his future, Hulkenberg told IANS: “I really enjoy this team (Force India), I know everybody really well and I enjoy working with the guys.
“At the moment my focus is simply on 2012 and doing the best job I can.”
Force India are in seventh place in the constructors' championship with 89 points, behind Sauber on 116.