 On 27 July 2006, Boateng was awarded the Fritz Walter Gold Medal in the Under-19 category.Boateng signed a four-year contract with Tottenham Hotspur in July 2007 for a reported £5.4 million, securing him ahead of UEFA Cup holders Sevilla.His success at the club was limited, and he was loaned to Borussia Dortmund in January 2009 for the remainder of the season.