West Ham United could be dealt a big summer transfer window blow by Manchester United it seems. The current summer transfer window is a hugely important one for both West Ham and Manchester United. Julen Lopetegui needs to strengthen his squad in pretty much every position at the London Stadium this summer. In fairness, you could say that Manchester United boss Erik ten Hag is in the same boat at Old Trafford. Aston Villa striker Jhon Duran is believed to be West Ham’s number one target right now, but there are other additions he desperately needs to make. Both the Hammers and the Red Devils a…