LOS ANGELES - Former world No 1 Maria Sharapova has scheduled a news conference Monday in Los Angeles to make a ‘major announcement’ raising questions about her tennis future after months of nagging injuries. Sharapove, 28, has played in only three WTA Tour events over the past eight months and has not taken to the court competitively since losing to Serena Williams in the Australian Open quarterfinals in January. Sharapova, ranked seventh, withdrew from the upcoming event at Indian Wells due to a left forearm injury. Sharapova is involved in several business ventures off the court, notably her “Sugarpova” candy line, and won a silver medal for Russia at the 2012 London Olympics. But in between her success, she has often been plagued by injury, notably long running problems with her shoulder.