I can't really say that Everton are playing their best game right now but still they are leading 1-0 against Southampton and they are the better side. Richarlison scored the goal and M. Keane's goal was cancelled by VAR decision because of an offside. But it is still a risky score for them and I think Everton will score their second goal too and win this game.
I think a 1 nil lead is always risky; because in a game of football; a lot can happen in 5 minutes and this is why Everton keeps pushing for another goal; i want the tie to end in a draw; so i assume a 1 - 1 draw; with Southampton getting a late equalizer
You are absolutely right in the world of football to score one goal is not enough to ensure victory, the team have to score at least 3 goals to kill
the game. Therefore, when Richarlison scored a goal in the 9th minute, Everton continued to apply pressure on Southampton to score the second goal.
Unfortunately the goal by Michael Keane in the 26th minute had to be canceled due to offense, so Everton had to create the next opportunity.
But all the opportunities created by Everton still failed to convert into goals, Indeed, it must be admitted that in these matches there were not
many opportunities created by Everton. Southampton should take advantage of the second half to equalize or even reverse the situation by scoring
two goals. But Southampton finally had to admit Everton's win, failing to score a goal for 90 minutes.