Serena Williams set the record for single-season prize money in women’s tennis by topping $6.5 million in 2009. Williams broke Justin Henin’s mark of slightly under $5.5 million from 2007. . . .

The World Anti-Doping Agency has asked the Association of Tennis Professionals to investigate Andre Agassi’s admission in an autobiography that he took crystal meth in 1997. . . .

The PGA suspended Doug Barron for one year for using a performance-enhancing drug. The 40-year-old golfer is the first player to violate the tour’s doping policy. . . .

BetOnSports.com’s Gary Kaplan will be imprisoned at least another year and forfeit $43.6 million as part of a plea agreement regarding his offshore gambling site.