Sunderland adds Swedish winger Karlsson

Sunderland confirmed on Wednesday that the club has completed the signing of winger David Moberg Karlsson from Swedish side Gothenburg.

The 19-year-old started his career with Mariestad before moving on to Gothenburg in 2010, where he made his senior debut at the age of 17.

Karlsson has appeared in 28 games for Gothenburg, including 10 matches this season, and he will add to manager Paolo Di Canio's attacking options.