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Ronald Koeman is keen on Porto midfielder Giannelli Imbula.

The Southampton boss is a big admirer of the 23-year-old, who only moved to his current club from French giants Marseille last July.

The Saints have yet to persuade their current star midfielder, Victor Wanyama, to commit to a new deal. Tottenham, Arsenal and Chelsea are understood to have watched the 24-year-old.

Wanyama had a transfer request rejected in the summer following a bid from Spurs and Arsenal legend Robert Pires has urged his former club to sign him.

Southampton, however, are hoping they can persuade him to sign a new five-year deal.