“As iron sharpens iron, so one man sharpens another.”
Proverbs 27:17 NIV
I worked for a man at a restaurant. When he wanted his knives to be sharp he would finish the process by sliding the blades of two knives against each other.
When you play ball, you can be the same way with your competitor. You can work hard and force each other to improve. That us a good thing.
You can both come out with a little better ball player and a with a little better character.