West Ham United have been quick out of the starting blocks in the summer transfer window as Julen Lopetegui looks to bolster his new side’s ranks. The Hammers have signed Brazilian midfielder Luis Guilherme from Palmeiras, alongside landing veteran goalkeeper Wes Foderingham on a free transfer. West Ham are now said to be prioritising a move for a new centre-back, in wake of a difficult season in which they struggled defensively. On Tuesday, the Hammers reportedly launched a bid for Nice and France defender Jean-Clair Todibo. However, the Ligue 1 club is said to have turned down West Ham’s off…