The former Jaguar and Red Bull man has not given up hope of competing in at least one race for the rookie team who have struggled financially in their debut season.
The teamÃ¢â‚¬â„¢s current drivers are Bruno Senna, and Sakon Yamamoto, with the Japanese driver replacing Karun Chandhok for the last two races at Hockenheim and Budapest, and before that replacing Senna at Silverstone.
With Yamamoto bringing more funding to the team than Chandhok, it would appear likely that Yamamoto will continue to race for HRT in the second half of the season.
Senna claims his contract guarantees him a seat until the end of the season, which if true, leaves Klien with Yamamoto as competition.
Klien said: Ã¢â‚¬Å“It’s hard to say. All four drivers in HRT are equally placed. It depends entirely on the team. I will try to be in the car as much as possible to accumulate experience.”
As well as his role with HRT, Klien has also driven for Peugeot in the Le Mans series, but with the French team wanting its drivers to concentrate on sports cars and not Formula 1, he will no longer compete for them and will instead focus on gaining a race seat in F1.
KlienÃ¢â‚¬â„¢s only appearances for HRT have come in Friday morning practices at Barcelona and Valencia, but the Austrian is confident of a return to competitive racing in 2011, either with the Spanish team or elsewhere, after revealing he is also speaking to other teams.
MORE: The latest football news
MORE: The latest tennis news
BIOGRAPHY: Cesc Fabregas