He's been out to play with a couple of friends one being a girl who's a bit bigger then him, he's small for his age. Anyway he's come in sheepish and I've asked what's wrong and if he's fallen out. Eventually he said they were playing football and he does take it quite seriously and she accused him of pushing when he was just tackling. Any way he said he wasn't pushing and was tackling so she apparently pushed him and he then retaliated and pushed her back and she's fallen on the ground and started crying. He said sorry and said he has texted her sorry and has come straight home so I think he feels a bit ashamed.
It's no excuse but he also had a very late night and early football match this morning so I know he's tired and short tempered anyway. But I'm so disappointed that he has lost his temper and didn't walk away. He's 10 by the way. How do I handle this?