VIENNA — Austrian tennis player Tamira Paszek faces a provisional suspension while officials investigate whether a medical treatment she received for a back injury violated doping regulations.

The Austrian anti-doping agency has asked its discplinary committee to temporarily ban Paszek.
Committee chairman Gernot Schaar said Wednesday that Paszek has seven days to respond.
The 18-year-old player received treatment earlier this month. Blood was taken for enrichment and later reinjected in the lower part of her back. Reinjecting one’s own blood is banned under international anti-doping rules.
The 59th-ranked Paszek alerted the doping agency eight days ago, saying she had not been aware the treatment was possibly illegal.