If you don't have Eurosports but have broadband then give this a go:
http://www.radios.com.br/pages-tv/TV-Italia/ and scroll down to LA7 TV and click play - 0935 CET Saturday for race 1 LIVE and 1650 CET for race 2 delayed
or for a low stream version click
http://www.radios.com.br/asx/la7-it.asx 
I've got Eurosports though but have used the LA7 stream in the past.