Force India is expected to end months of speculation by finally announcing its 2012 driver lineup on Friday.
The news had been expected to come on Thursday, coinciding with the Silverstone based team's Christmas party.
"My understanding is that it seems most likely that there will be no announcement (on Thursday)," Nico Hulkenberg's manager Timo Gans warned en route, "but probably Friday."
It is almost certain that German Hulkenberg, the team's 2011 Friday driver, will be confirmed alongside Scot Paul di Resta, with Adrian Sutil in the running to switch to Williams.
London's Times newspaper reported that di Resta has definitely secured one seat, with German Sutil indeed expected to lose out to 24-year-old Hulkenberg.