Top seeds Robert Lindstedt and Nenad Zimonjic battled into the semi-finals of the If Stockholm Open on Friday as they edged Eric Butorac and Paul Hanley 6-3, 3-6, 14-12 in 86 minutes. The Swedish/Serbian duo won one point less than their opponents and both teams broke serve three times.

Lindstedt and Zimonjic are debuting their new partnership this week ahead of teaming up full time for the 2013 season. The 36-year-old Zimonjic was runner-up at this ATP World Tour 250 indoor hard-court tournament in 2005 with Leander Paes, while the 35-year-old Lindstedt is bidding to win his fourth title on home soil after three victories at the SkiStar Swedish Open in Bastad.