NOVI SAD - Roger Federer, a last minute addition to Switzerland's team, opens the Davis Cup World Group first round tie against Serbia's Ilija Bozoljac, ranked a modest 268th, on Friday. Federer, who fell to Rafael Nadal in the Australian Open semi-finals, was initially left off the Swiss squad sheet for this tie against last season's beaten finalists. But the world number eight decided to make a rare first round appearance to help a Swiss team featuring Stanislas Wawrinka, who succeeded where Federer failed in Melbourne by beating Nadal to clinch his first Grand Slam title on Sunday. Wawrinka, who has risen to third in the world, follows Federer on the hard indoor surface at Novi Sad against Dusan Lajovic. The Serbs are weakened with the absence of Novak Djokovic and Janko Tipsarevic.–AFP