The 2008 If Stockholm Open was a tennis tournament played on indoor hard courts. It was the 40th edition of the event known that year as the If Stockholm Open, and was part of the International Series of the 2008 ATP Tour. It took place at the Kungliga tennishallen in Stockholm, Sweden, from October 6 through October 12, 2008.
The singles draw featured ATP No. 7, Buenos Aires champion, Acapulco runner-up David Nalbandian, Wimbledon quarterfinalist, Marseille finalist Mario Ančić, and Australian Open quarterfinalist, Adelaide runner-up Jarkko Nieminen. Also lined up were Rotterdam and Memphis finalist Robin Söderling, Wimbledon semifinalist Rainer Schüttler, José Acasuso, Albert Montañés and Marcel Granollers.
David Nalbandian def. Robin Söderling, 6–2, 5–7, 6–3
- It was David Nalbandian's 2nd title of the year, and his 9th overall.
Jonas Björkman / Kevin Ullyett def. Johan Brunström / Michael Ryderstedt, 6–1, 6–3