Another devastating setback for Tiger Woods ... the golf legend just announced he tore his Achilles.

On Tuesday afternoon Tiger announced that he suffered the injury training for the upcoming PGA Tour season at his Florida home. He stated it was his left leg that gave out on him -- not the right one that was nearly amputated following his infamous 2021 rollover car crash.

Tiger added he underwent “minimally-invasive” surgery to fix this issue Tuesday morning ... which doctors deemed successful.

“The surgery went smoothly,” his doc said in the statement, “and we expect a full recovery.”

Tiger is back at home in Jupiter, Florida, and plans to “focus on my recovery and rehab.”

A timeline for his return to competition wasn’t immediately known.