(CNN) -- The seeds just can't stop tumbling out of Wimbledon and on Monday it was the turn of world No.1 and five-time champion Serena Williams to experience that sinking feeling.
The American crashed out of the grass court grand slam in the last-16 following a shock defeat by Germany's Sabine Lisicki -- her first reverse in 34 matches.
Favorite for the title, Williams lost the opening set 6-2 before roaring back to level a pulsating contest by taking the second 6-1.
But Lisicki, seeded 23rd at the tournament, produced one of the greatest performances of her career, coming from a break down to take the final set 6-4 and send shockwaves through tennis.
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