As Mauricio Pochettino would say. This is football. Sometimes you are rewarded for your efforts and sometimes the other team weathers the storm and survive with a point shared between you two. It hurts but it happens. Think about all those seasons where you marched on to an easy league cup win and be grateful for those times because while you were dominating there was someone like you pissed off that their team drew against a team they should have mowed over or lost to a team that they were dominating.