By Steve Keating BEAVER CREEK, Colorado (Reuters) - Austria's Anna Fenninger had the fastest opening leg of the women's giant slalom at the alpine ski world championships on Thursday, while Slovenia's Tina Maze set herself up for a fourth medal. Fenninger, who already won gold in the Super-G and silver in the downhill, enjoyed a sizzling opening run of one minute, 8.98 seconds, according to unofficial results. Maze, who is bidding to join Norway's Lasse Kjus as the only skier to medal in all five alpine disciplines at a single world championships, kept her bid for ski racing history on track with the fourth best effort of 1:10.08. American hopefuls Mikaela Shiffrin and Lindsey Vonn both had disappointing runs finishing well outside the top 10. Click here to read full news..