BBC Sport looks at why new boss Thomas Frank wanted to add him to his squad – and why the transfer is a rare move for the north London outfit.

Tottenham have completed the signing of West Ham playmaker Mohammed Kudus. Kudus moves across the English capital to become the latest addition to Thomas Frank's Lilywhite revolution in a deal worth a reported £55m to the Hammers. Tottenham Hotspur Have Agreed On A Deal To Sign This West Ham United Ace: Good Signing For Frank?

Tottenham complete £55million deal for West Ham winger - Ghana international played 65 times in the Premier League for his former club