HRT, Sauber, play down driver lineup rumours

The HRT and Sauber teams have moved to play down speculation that suggests their driver lineups may soon change.

In recent days, reports have said Bruno Senna might be replaced at the new Spanish team HRT by the higher-paying Japanese reserve driver Sakon Yamamoto.

And persistent speculation has dogged Sauber's Pedro de la Rosa this year, with the latest reports saying Italian GP2 driver Luca Filippi could become Kamui Kobayashi's new teammate.

Both teams released interviews to the media on Thursday.