Boyfriend has scratch marks on his chest?

Hi everyone, I migh come a cross paranoid but recently I’ve had people tell me rumors about my boyfriend having cheated on me. My boyfriend plays football at university so he is quite well known in our area. He came home on Saturday night with scratches on his chest. He plays games on saturdays and the always goes out with his friends after. He says the scratches are from the game but to me they really look like sexual marks, usually when he gets scratches it’s just one or two lines but I know sexual ones are generally more than that. Do you think he could be cheating? Any advice on how to approach this situation?
Boyfriend has scratch marks on his chest?
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