West Ham will hear who their Europa League opponents are on the 15th July and there is a fifty percent chance they will be drawn away from home in the first leg which would not cause a fixture problem as the stadium will be converted from Athletics mode by the 1st August.
The Europa League 3rd Qualifying Round first leg is scheduled to be played on 28th July with the return leg on the 4th August.
Should the Hammers be unlucky and be drawn at home for the first leg they will just ask UEFA and the opposing team to switch legs. This should be a simple process and is not without precedence. Last season, West Ham were drawn away in Andorra against FC Lusitans but both sides agreed to swap the legs and the first leg was instead played at the Boleyn Ground on Thursday 2nd July with the away leg on Thursday 9th July.
Other commentators have mentioned the Juventus friendly on 7th August could be moved but there is little room to reschedule with the Premier League starting on Saturday 13th August and quite frankly no reason to.
The Juventus friendly will probably see just a cameo appearance from many of the senior players with a long season ahead. The likes of Reece Oxford, Reece Burke, Darren Randolph, Havard Nordtveit and Toni Martínez will likely get a start along with many of the new signings who won’t necessary go straight into the first team.
There you go,simple solution.Its always much easier to wait for an explanation before going into crisis mode about it like some sites.