All-rounder Shane Watson was on Monday recalled in Australia's 12-man squad for next week's first Test against South Africa, which included off-spinner Jason Krejza as well subject to his fitness.

"Shane Watson is back into the 12 and one of the main reasons he wasn't in the 12 for Adelaide was that we wanted to take the opportunity for him to play for Queensland," National Selection Panel (NSP) Chairman Andrew Hilditch said.

"He had a good Sheffield Shield game against South Australia, taking wickets and making runs, and adds great flexibility to the squad for this first Test.

"Peter Siddle is omitted from the 12 but he continues to impress following his debut in India. We're keen for him to resume State cricket for Victoria and expect Peter to continue to push hard for national selection," Hilditch said.

On the squad, Hilditch said, "The 12 picked for the first Test against South Africa reflects the fact that the NSP thinks the team played well against New Zealand recently. It is quite difficult to bounce back from the series in India, which was a tough tour, and to adapt quickly to Australian conditions.

"One of the most pleasing parts of the New Zealand series was the good form of Brett Lee, whose bowling improved as the series went on. We expect him to be back to his very best against South Africa."

Stumper Brad Haddin seemed to have won the trust of NSP, as does pacer Mitchell Johnson.

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