Australia's Lyon determined to bounce back after surgery
The 38-year-old faces an extended period on the sidelines after damaging his right hamstring saving a boundary on day five of the third Ashes Test in Adelaide.
McDonald said Lyon remained a key part of their plans as reports speculated that his 141-Test career could be over.
It is the second serious injury Lyon has sustained in two years after being ruled out of the previous Ashes series against England with a calf injury picked up at Lord's in 2023.
He had surgery on Tuesday, but was expected...