Spurs, who have yet to disclose the amount paid or the length of contract, fought off competition from Sevilla for the 20-year-old midfielder.
Regarded as one of the most talented youngsters in Germany´s Bundesliga, Boateng made 42 appearances for Hertha and has been capped by Germany at youth and Under-21 level as well as being voted the country´s best youngster in July last year.
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