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 Hotspur have signed forward Mohammed Kudus from West Ham United on a long-term contract, the North London club said late on Thursday.

Tottenham have signed Mohammed Kudus from West Ham and are set to capture Nottingham Forest's Morgan Gibbs-White in a double swoop worth over £100 million ($136 million). Kudus scored 19 goals in 80 appearances for West Ham since joining from Ajax for £38 million two years ago.