West Ham United boss Julen Lopetegui says he has been seriously impressed by one of his summer signings even if others haven’t been. West Ham signed nine new players to usher in the Julen Lopetegui era in the summer. So the excitement was palpable among fans as well as increased expectation. Over £155m was spent on deals for Luis Guilherme, Max Kilman, Niclas Fullkrug, Jean-Clair Todibo, Crysencio Summerville and Aaron Wan-Bissaka. Meanwhile Wes Foderingham and Guido Rodriguez arrived on free transfers. But West Ham’s indifferent start to the Premier League season and Lopetegui’s approach of d…