New to all this?
Start with the whole approach behind five minutes in the garden.
See the approachBefore and after football are two different questions, not one blanket rule.
A short, timed screen window before play does not need to be treated as automatically harmful, but straight after is where screens quietly eat the good mood a session just built.
I used to ban screens outright for the whole afternoon before football, on the assumption it would somehow sharpen him up, until I noticed the ban itself was causing more of the fight than any tablet ever had.

Two directions, two answers
Online advice tends to treat this as one lump question: either screens are banned around play entirely, or nobody thinks about it at all. The two directions pull in genuinely different ways. Before a session, the problem is mostly getting a reluctant child out of the door, tablet or no tablet. After a session, the problem is different: a good kickabout builds a mood worth protecting, and a screen going on the second the ball goes away can undo that faster than anything else in the evening.
Treating screen time and football as one blanket rule misses that the before question and the after question get answered by two different things entirely, not by picking one stance and applying it both ways.
One rule for each direction
The tablet fight most families have every evening actually needs two separate rules, pulling in opposite directions, not one. Here's the shape of each.
Before: a short, timed window, if it helps. Five to ten minutes, ending on a clear countdown rather than an open-ended "just one more thing", and only if it genuinely helps a reluctant child get out the door, not handed over as a reward to earn first.
After: let the mood run first. The ball goes away, then there's a real cool-down stretch, a drink, a couple of minutes talking about the best bit, before any screen reappears, so the session's own good mood gets a bit of time to land before a screen replaces it.

One study, honestly hedged
A study of screen time and children's attention looked at 77 children aged 6 to 10 (Liebherr, Kohler, Brailovskaia, Brand & Antons, 2022). It used a computerised task that measured how well they could switch their attention between different types of information, and found no significant link between how much screen time a child had and how they performed on that attention-switching task.
This is one study, using parent-reported screen time rather than directly observed use, and it measured a lab attention task rather than real-world focus in the minutes after screen use before a football session. That argues against a sweeping "screens wreck focus" claim, not proof that timing never matters in any one family.
The rule that survives a tired evening
The rule that sticks is the one stated as a countdown before it starts, not negotiated in the moment it ends. Announcing the after-rule once the tablet is already back in the child's hand never works; announcing it before the boots go on does.
"Shall we set five minutes on the clock, then boots on when it beeps?" works better as a script than "right, that's enough" ever does after the fact, because the child agreed to the shape of it before there was anything to argue about.
The after rule needs its own stated line, said before the boots go on: "Ball away, then a stretch, a drink and the best bit of the game, and the tablet comes back after that." Naming the sequence up front turns it into something the child agreed to, not something sprung on them once the mood has already broken.
Quick answers
Not necessarily. A short, timed window can help a reluctant child transition outside; the problem is an open-ended screen session with no clear end, not screens themselves.
A good session builds a mood worth letting run for a minute before a screen replaces it. Going straight from ball to screen cuts that off before it has a chance to land, which is why the after direction gets its own rule rather than sharing the before rule.
One study found no significant link between screen time and children's attention performance, though it is a single study and does not rule out an effect in every individual child.
Keep going
Three places to go next, depending on which end of the session you're stuck on. If screens keep winning, when a child prefers FIFA to real football suggests how to bridge the gap.
Start with the whole approach behind five minutes in the garden.
See the approachA phrase bank for the moments while play is happening.
See the phrase bankA three-part way to call time on a session without a fight.
See the ending ritualTonight's five minutes
Two small rules, not one big ban.