Joachim Johansson, a former top-10 player who retired a year ago due to a shoulder injury, won in his first match since last year's Open when he beat Nicolas Mahut of France 7-5, 7-6 (5).
The 26-year-old Johansson fired 20 aces, and didn't want to think about his next match against top-seeded David Nalbandian.
"To play in front of the family, the Sodertalje fans and everyone else ... it is totally unbeatable,'' Johansson told news agency TT. "I did not feel my shoulder at all.''
However, Jonas Bjorkman, who was retiring after this season, played his last singles on home soil when he fell to sixth-seeded Juan Monaco of Argentina 6-2, 6-4.
The 36-year-old Bjorkman, who has won six single and 52 doubles titles, received a standing ovation as he left the Royal Tennis Hall.
"It wasn't exactly the way I had imagined my last game, since things felt really good during training. But Monaco is good, he moves well,'' Bjorkman said. "It was not just the fact that I did a bad game, he made me bad too.''
Argentina's Nalbandian easily advanced to the second round by beating Bobby Reynolds of the United States 6-1, 6-1.
Second-seeded Mario Ancic of Croatia overcame a slow start to beat Olivier Rochus of Belgium 7-6 (6), 6-2. He will face Steve Darcis of Belgium, who ousted countryman Christophe Rochus 2-6, 6-3, 6-3.
Fifth-seeded Rainer Schuettler of Germany easily ousted Chris Guccione of Australia 6-0, 6-3 and will next meet Nicolas Lapentti of Ecuador.
Sixth-seeded Jose Acasuso of Argentina, who beat Germany's Matthias Bachinger 7-6 (5), 3-6, 7-6 (4), will play Oscar Hernandez of Spain. Hernandez defeated Ivo Minar of the Czech Republic 6-4, 6-3.
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