Tommy Conway's equaliser at the London Stadium nine days earlier had set up this return tie and the 21-year-old striker was the Robins' hero again as his early goal proved the difference.
Tommy Conway's equaliser at the London Stadium nine days earlier had set up this return tie and the 21-year-old striker was the Robins' hero again as his early goal proved the difference. West Ham, sixth in the Premier League, suffered further misery as Said Benrahma was sent off after 51 minutes for reacting stupidly to a strong challenge from Joe Williams, who had earlier escaped a red card for a strong challenge on Danny Ings. On there being no VAR in the game, West Ham boss David Moyes said: "It's incredible they call it the best cup competition in the world. Yet one week you have VAR, one week you don't. "I find it quite ridiculous they try to claim that, but it's not level for every club. If we're not having VAR we shouldn't have it in the tournament at all. If we're going to have it, then have it everywhere."