Serena Williams' coach: allow on-court coaching

Patrick Mouratoglou, the coach at the center of Serena Williams' controversial US Open defeat, says coaching should be allowed at all tennis tournaments to make it more exciting on television and help grow the sport.

His comments come after last month's US Open women's final descended into chaos when chair umpire Carlos Ramos handed the former top-ranked American three code violations, including one for receiving coaching from her long-time coach Mouratoglou in the stands.

Williams furiously...

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