Answer:
You tell Chris
Step-by-step explanation:
You tell Chris because as his friend you need to be honest with him. The benefit of telling Chris is that by hearing it directly from you, it won't hurt his feelings as much. It'll avoid a worse confrontation later and it can be dealt with quickly and most peacefully. Instead of getting directly involved by telling Chris, you could work with Chris on his goal keeping skills, that way Ethan wouldn't be able to criticize Chris' skills and Chris wouldn't have to feel bad about what Ethan said because it would no longer be true.