Historical clue formulations

• Court figure with a renowned temper — 2023-06-18
• Sporting great with the book "You Cannot Be Serious!" — 2015-10-14
• Famously temperamental court figure — 2012-05-13
• Tennis star-turned-analyst — 2007-07-25
• John who won tennis's U.S. Open four times — 2006-02-27
• Three-time Wimbledon winner — 2000-01-31