|Picture by Monique Limbos|
Ronnie - ranked provisionally 18 in the world - set about his business in Berlin with his place in the top 16 and automatic qualification to the World Championship hanging by a thread.
After slumping to a 4-0 deficit, he was all but written off and talk started about his last ranking event whitewash at the 2006 China Open.
But, we all know Ronnie loves a challenge and he came charging back to win it 5-4.
Higginson missed chances to win the match but it was vintage O'Sullivan as he proved again how good he is under pressure. His back was to the wall, the shackles were off and he responded well. He played solid snooker under pressure to complete a turnaround the German fans will cherish.
Suddenly, from the brink of defeat, he's ready for a last 16 meeting with Joe Perry and stands a good chance of enjoying a much-needed run.
I read earlier that since reaching the World Open final in September 2010, Ronnie has been to only one major ranking event quarter-final. His unlikely win from the jaws of defeat today could be just the boost he needs get there again and launch an overdue attack for major honours.