Australia's new Twenty20 captain Mitchell Marsh said on Tuesday that the "incredible talent" of uncapped fast bowler Spencer Johnson will make him one to watch on their white-ball tour of South Africa.READ | Star duo Smith, Starc out of Australia's tour of South AfricaWith one-day skipper Pat Cummings sidelined by a fractured wrist but expected to return for October's Cricket World Cup, Marsh will lead Australia in three Twenty20 and five 50-over matches against South Africa, starting next week.Left-arm quick Johnson, power-hitter Matthew Short and left-arm seamer Aaron Hardie have all earned maiden national call-ups.Marsh said Johnson, 27, had hit form after a series of injuries earlier in his career."We haven't seen much of him because he's had a lot of injuries and he sort of burst onto the scene last year," Marsh told reporters. "He's an incredible talent."I faced him in a one-day final and was blown away by his skill and pace, so I think he's going to feel right at home." T20I Series Wednesday, 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, Durban ODI Series Thursday, 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, JohannesburgMarsh said Short and Hardie will