You’ve missed the point completely.
There’s no such thing as “seams”, they’re called gaps in the defence and the space in behind the defence.
If you want to beat the backline, you need to draw defenders out of the back line to ensure the numbers are in your favour ie a midfielder needs to make a run at the defence OR your striker comes deep for the ball, bringing a defender out of the back line thus creating space for that same player or another player to run into.
The concept is called creating space!
The space in front of and behind lines are called “gaps”. The space between defenders in a line are called “seams”. Just so we all know correct terminology.
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