Steve Smith and Mitchell Starc have been ruled out of Australia's white-ball tour of South Africa with injuries, but are expected to be fit for the Cricket World Cup.Cricket Australia said star batsman Smith had a tendon issue in his left wrist and must wear a splint, while pace spearhead Starc was struggling with groin soreness since returning from the Ashes series against England.READ | Dewald Brevis earns maiden Proteas call-up for Australia seriesThey will miss the three Twenty20s and five one-day internationals against South Africa from 30 August - 17 September.Chief selector George Bailey said they were taking "a conservative approach" with the pair in the build-up to the ODI World Cup in India in October."With the World Cup the priority of the squad, it was determined on advice that it was best for Steve and Mitchell to join the group in India," Bailey said in a statement late Friday.T20I SeriesWednesday, 30 August - 18:00 - South Africa vs Australia at Kingsmead Stadium, DurbanFriday, 01 September - 18:00 - South Africa vs Australia at Kingsmead Stadium, DurbanSunday, 03 September – 14:00 - South Africa vs Australia at Kingsmead Stadium, DurbanODI SeriesThursday, 07 September - 13:00 - South Africa vs Australia at Mangaung Oval, BloemfonteinSaturday, 09 September - 13:00 - South Africa vs Australia at Mangaung Oval, BloemfonteinTuesday, 12 September - 13:00 - South Africa vs Australia at JB Marks Oval, PotchefstroomFriday, 15 September - 13:00 - South Africa vs Australia at SuperSport Park, CenturionSunday, 17 September - 10:00 - South Africa vs Australia at Wanderers Stadium, JohannesburgAustralia are scheduled to play three ODIs against India before the World Cup starts.The T20 squad was already missing