Salisu joined his teammates in England for mid-season training as they prepare for the return of the English Premier League.
Salisu had a brilliant World Cup campaign with the Black Stars after becoming the first Ghanaian defender to score at the World Cup.
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The 23-year-old was ever present in all three matches and was one of the best players in Qatar.
His return is very positive for Southampton as they hope to turn their season around after a difficult start.
Ralph Hassenhutl was sacked as a result of their shaky start to the season.
despite the struggles of Southampton, Salisu has enjoyed a remarkable start to the season with an assist to his name in 14 appearances so far.
