The injury to Leny Yoro on Sunday morning is a massive blow for Manchester United and shows that additional work must be done at centre-back. For Manchester United, the centre-back is far and away the biggest priority this summer which we thought had been at least partially solved with the arrival of Leny Yoro. However, the issue is that now with the injury to Yoro, the lack of quality has once more become clear with Jonny Evans, Harry Maguire and Victor Lindelof nowhere near good enough for United to get back to where we desire to be. So with Yoro out for an undefined length of time, a second…