Alexander Rossi says his chances of a Manor race seat for 2016 are "looking good".
Late last season, the Californian rookie replaced the under-funded Roberto Merhi, but for this year it is believed Will Stevens, Rio Haryanto and Pascal Wehrlein are all also in the running for the two seats at the backmarker team.
Manor is the last team to announce its drivers for 2016.
"Things sometimes get pushed out in this sport and it is something I am used to and hopefully it doesn’t go on much longer," Rossi told Britain’s Sky.
"I think the deadline is really when cars roll in Barcelona in a couple of weeks," he added. "Things are looking positive and hopefully we get it done very soon."