Watford has completed the signing of Sweden international Ken Sema from Ostersunds.

The 24-year-old joins on a five-year deal and becomes the Hornets' fifth off-season signing after Gerard Deulofeu, Marc Navarro, Adam Masina and Ben Wilmot.

Midfielder Sema racked up 58 league appearances during two-and-a-half years with the Swedish top-flight side and has won five caps for his country, though he did not make its World Cup squad.

He made headlines last season when he scored the winning goal in Ostersunds' shock 2-1 Europa League win over Arsenal at the Emirates Stadium.

Watford is also understood to be closing in on the signing of goalkeeper Ben Foster from West Brom.