Ghana striker Asamoah Gyan has joined Lokomotiv Moscow in the biggest purchase of the Russian pre-season.The 21-year-old moves from Italian Serie A side Udinese in a deal worth US$10.5m.Ghana international spent the last two seasons on loan at Serie B club Modena before rejoining Udinese at the start of this season.He played for his country at the World Cup in Germany in June and scored in the Black Stars' thrilling 2-0 victory over the Czech Republic.The transfer fee reflects the demand for a player who has scored 12 goals in 19 appearances for his country.But Spartak Moscow's acquisition of Argentinean Fernando Cavenaghi for US$13m in 2004 remains a Russian record.Gyan moved to Udinese from the local side Liberty Professionals in 2003.BBC