Read the goalkeeper's position in the first ten minutes
Watch where the goalkeeper stands when his team has the ball. If he is far from his goal, he is acting as an extra outfield player for the build-up. If he stays on his line, the team prefers direct passes to the forwards. This tells you how they intend to progress the play.
The consequence is clear. A goalkeeper high up the pitch creates a passing lane to the centre-back but leaves space behind him. That space becomes relevant for counter-attacks. The team will try to control possession in your half. If the goalkeeper is deep, expect longer balls and second-ball contests in the middle third.
Use this observation to adjust your read before placing any bet. A high line with a high goalkeeper can be vulnerable to pace. A deep goalkeeper often means fewer chances for the opposition to press high. Either shape can be exploited if you identify it early. Give the match ten minutes to confirm the pattern and then decide.
The first ten minutes often expose a bad pre-match assumption. Watch the last line before you watch the ball.
Question: Where is the goalkeeper standing when his team has possession in your next match?