Paul di Resta is "surprised" that Force India have yet to confirm their 2013 line-up including the name of his new team-mate.
Force India is one of only two teams with a seat still available for this year's Championship, the other team being Caterham.
It is thought that Force India test driver Jules Bianchi is in a race against former driver Adrian Sutil to partner di Resta this season.
Speaking to Press Association Sport about the team-mate situation, di Resta said: "I am surprised there has been nothing yet.
"The team have said they will announce it in good time as to where they are going to be, and I have to respect that."
Pressed as to whether not knowing his team-mate made a difference to him the Scot explained: "Ultimately it does.
"But at the end of the day I know my job, and I am fully focused on what I need to achieve at the moment.
"Whether that is managing my time, booking flights, working with the engineers, or whatever.
"I know who my team are, who my mechanics are. There are some new faces in that, which means we will be stronger again.
"But I'm feeling quite good about it, very positive. I've been at the factory and the vibe is very high."
Looking ahead to the new season and the start of pre-season testing, which gets underway on February 5, di Resta is keen to begin on a high note following last year's dismal run-in.
Di Resta scored just two points in the final six races with his season ending with a crash at the finale in Brazil.
"For whatever reason nothing went the right way at the end of last season.
"Essentially you always remember the end of a year more than the beginning, and with my crash as well.
"There were some good drives, some good pace, but it just never worked out.
"I've been through times like that where you just need to dig deep, and eventually you get out of it. Hopefully this year will be the year.
"Obviously, when something bad happens you just want to get back in the car the next week and go again, but there has been this lull.
"All I can say is I'm looking forward to getting in the car on the first of February, and then testing again a few days later."