Christian Ulf "Chippen" Wilhelmsson is a Swedish former professional footballer who played as a winger. Beginning his career with Mjällby AIF in 1997, he went on to represent clubs in Norway, Belgium, France, Italy, Spain, England, Saudi Arabia, the United States, and Qatar before retiring at Mjällby in 2015. Wilhelmsson won 79 caps for the Sweden national team between 2001 and 2012, and represented his country at the 2006 FIFA World Cup and at Euro 2004, 2008, and 2012.

Mjällby Allmänna Idrottsförening, also known simply as Mjällby AIF, Mjällby or MAIF, is a Swedish professional football club based in Hällevik in Sölvesborg Municipality. The club is affiliated to Blekinge Fotbollförbund and play its home games at Strandvallen. The club colours, reflected in their crest and kit, are yellow and black. Formed on 1 April 1939, the club have played eight seasons in Sweden's highest football league Allsvenskan, the club's first season in the league was in 1980. The club are currently playing in Allsvenskan. With nine seasons in the top division Allsvenskan, Mjällby AIF is the most successful football team from the province of Blekinge.