West Ham United have signed teenage goalkeeper Raphael Spiegel from Swiss side Grasshopper Zurich for an undisclosed fee, the newly-promoted Premier League side announced today. The 19-year-old, who is a Swiss U-20 internationalist, has signed a three-year contract with an option for a further year and will arrive in East London this week. The 6ft 3in custodian is expected to provide back-up to senior goalkeepers Jussi Jaaskelainen and Stephen Henderson, who both joined the Hammers this summer following the club\'s promotion from the second tier Championship. West Ham have also brought in defender George McCartney, midfielder Mohamed Diame and Mali forward Modibo Maiga as manager Sam Allardyce shapes his squad for the new campaign.