Serena Williams bowed out before the fourth round of the Australian Open for just the fourth time in her illustrious career.

The 23-time grand slam champion went down to Wang Qiang in a huge upset on Rod Laver Arena on Friday.

A seven-time champion in Melbourne, Williams made her earliest exit at the tournament since 2006.

We take a look at her earliest departures from the year's opening grand slam after her stunning loss to Wang.

1998, Second round: lost to Venus Williams 7-6 (7-4) 6-1

This was the first professional meeting between the Williams sisters. Venus, bound for the quarter-finals, overcame her younger sister in a head-to-head matchup she would eventually lose more often than not.

1999, Third round: lost to Sandrine Testud [14] 6-2 2-6 9-7

Only a controversial call on match point denied a 17-year-old Williams victory against Testud. Williams thought she had clinched victory in the 14th game of the third set before an overrule, and she would go on to fall to the French 14th seed.

2006, Third round: lost to Daniela Hantuchova [17] 6-1 7-6 (7-5)

On a 16-match winning streak at the Australian Open, having won the title in 2003 and 2005 and skipped 2004 due to a knee injury, Williams' run came to a surprise end against Hantuchova, left again to rue errors in a shock defeat.

2020, Third round: lost to Wang Qiang [27] 6-4 6-7 (2-7) 7-5

Chasing a record-equalling 24th grand slam singles title, Williams stunningly fell to Wang, a player she had crushed 6-1 6-0 at the US Open just months earlier. However, 56 unforced errors proved to be her undoing as Wang produced a consistent display to cause an upset after two hours, 41 minutes on Rod Laver Arena.