Sport news update, what you need to know

TENNIS - Samantha Stosur has kept alive her dream of adding a French Open title to her collection by seeing off Bulgaria's Tsvetana Pironkova in a greulling quarter-final.

OLYMPICS - The International Olympic Committee (IOC) will target Russia, Mexico and Kenya in pre-Olympic drugs testing due to the countries' track records as it looks to root out cheats ahead of this year's Rio de Janeiro Games.

GOLF - Republican presidential candidate Donald Trump has blasted the PGA Tour for plans to move a major golf tournament from Trump's Doral course in Miami to Mexico.

AFL - Melbourne coach Paul Roos won't ask Jack Viney to curb his aggression despite the combative onballer's one-match AFL ban for striking.