Arsenal overcame Chelsea on Wednesday night at the Emirates to reach the Carabao Cup final.
While both of their goals owed something to good fortune, they also came in a game in which the balance of the game swung in their favour courtesy of some sensible tactical switches and effective work by Arsene Wenger.
Sportsmail has taken a look at the decisions that caused the match to be won and lost and how each team went about trying to earn a place at Wembley...
Finally, someone exploits Chelsea weakness
It was at the Emirates that Antonio Conte first wheeled out the 3-4-3 system that saw Chelsea rocket to the Premier League title last season.