the 1v1 on the keeper at the beginning was a wasted opportunity.
the chance he got at the end of the game was NOT easy. He was pressed closely by 2 Girona players and the keeper. This one was NOT his fault.
I think it was a lefty shot rather than a cross from Banega that deflected off the heel of Roberto. Lenglet probably could not react in time to the deflection that turned out to be a perfect "cross".