Publicly traded sports team Manchester United MANU could attract attention from investors with signs of strong commercial and broadcasting revenue when the company reports fourth-quarter results on Wednesday before market open.Here are the earnings estimates from analysts and key items to watch.Earnings Estimates: Analysts expect Manchester United to report fourth-quarter revenue of $225.8 million, up from$179.4 million in last year's fourth quarter, according to data from Benzinga Pro.The company has beat ...