I used to go to games with a pal of mine who was a scout for City back in the day. He’d been an England schoolboy international and signed for Utd before he did his cruciate when he was 18. That was career ending then. So he knew his football.
Many a time he’d gone to scout a player and we’d be gone well before the end of the game. Sometimes at half time he’d say “ Come on we’re going, I’ve seen enough “.