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Every time I serve tennis balls, if I hit too hard my shoulder would make a somewhat cracking/popping sound and then it would hurt (around the area where the Glenohumeral joint is at) the pain subsides in about 5 minutes or so, but the area remains sore for a day or two. This has happen...

Every time I serve tennis balls, if I hit too hard my shoulder would make a somewhat cracking/popping sound and then it would hurt (around the area where the Glenohumeral joint is at) the pain subsides in about 5 minutes or so, but the area remains sore for a day or two. This has happen...