The opening Grand Slam event of 2022, the Australian Open, will get underway later this month in Melbourne and there appears to be plenty of potential for shocks in both the men's and women's draw.
Britain's Emma Raducanu produced arguably the biggest surprise in tennis history when she became the first qualifier to win a Grand Slam event in the Open Era by triumphing at last year's US Open.
A similar shock may be unlikely at the Australian Open, where all the action will be on the Sports Live Streaming but the opening Grand Slam of the year does have a tendency to surprise.
We have taken a look back at some of the biggest upsets in the tournament's history.
1976 Men's Final: Mark Edmondson bt John Newcombe - 6-7, 6-3, 7-6, 6-1
Not many people expected world number 212 Mark Edmondson to beat fellow Australian John Newcombe in the 1976 final, with former world number one Newcombe having already won two of his seven Grand Slam titles in Melbourne.
Newcombe had even given his compatriot advice on how to handle the big occasion during his run to the final, but that backfired, as despite losing the first set Edmondson claimed a shock victory.
That proved to be the highlight of Edmondson's singles career, although he did go on to reach the semi-finals of the Aussie Open in 1981 and the US Open a year later, but his speciality was no doubt the doubles, as he claimed five Grand Slam titles in that format between 1980-85.
For Newcombe, the defeat signalled the beginning of the end of his illustrious career, as he made just one more Grand Slam quarter-final before retiring in 1981.
1984 Women's Semi-Final: Helena Sukova bt Martina Navratilova - 1-6, 6-3, 7-5
Martina Navratilova was the dominant force in women's tennis throughout the 1980s and having won each of the last six Grand Slam titles, was clearly at the peak of her powers.
The Czech star was also on a 74-match winning run ahead of her semi-final clash with compatriot Helena Sukova, who was appearing in the last four of a Grand Slam for the first time.
It was certainly expected to be a foregone conclusion for Navratilova, especially after she won the first set 6-1, but Sukova had not read the script and produced a stunning comeback.
Sukova lost the final to Chris Evert and never got her hands on a Grand Slam singles title, despite reaching three more finals. Meanwhile, Navratilova bounced back by winning a further seven singles titles, while also enjoying plenty of success in the doubles.
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1999 Women's Semi-Final: Amelie Mauresmo bt Lindsay Davenport - 4-6, 7-5, 7-5
Amelie Mauresmo would become a two-time Grand Slam champion and world number one during her distinguished career, but she was still a relative unknown when she made it through to the semi-finals in Melbourne in 1999.
US Open champion and top seed Lindsay Davenport was Mauresmo's opponent in the last four and she was expected to wipe the floor with her French rival.
Things didn't pan out that way, however, as Mauresmo came from a set down to edge what proved a thrilling contest, although it may also have taken its toll on the victor, as she was comprehensively beaten by Martina Hingis in the final.
Both players did go on to taste Australian Open glory, with Mauresmo triumphing in 2006, while Davenport became the first Grand Slam winner of the new millennium in 2000.
2002 - Men's First Round: Alberto Martin bt Lleyton Hewitt - 1-6, 6-1, 6-4, 7-6
Lleyton Hewitt was the darling of Australian tennis at the turn of the century and expectations were high that he could deliver a home success at the 2002 Aussie Open. After all he was the reigning US Open champion and world number one heading into the tournament.
Even a bout of illness in the build-up was not expected to derail Hewitt, especially during his first-round tie with journeyman Spanish player Alberto Martin.
After winning the first set 6-1, Hewitt appeared to be cruising, but remarkably Martin won the next three to seal the biggest win of his singles career, while his opponent became the first top seed to lose in the first round of a Grand Slam for 12 years.
Martin was eventually eliminated in round three, while Hewitt softened the blow of his ignominious defeat by winning Wimbledon later in the year. However, he never did triumph in Melbourne, his best showing coming in 2005 when he was beaten in the final by Marat Safin.
2006 - Men's Fourth Round: Marcos Baghdatis bt Andy Roddick - 6-4, 1-6, 6-3, 6-4
Cypriot Marcos Baghdatis had lost in the first round of his three previous Grand Slam tournaments, so he was already enjoying an impressive run at the 2006 Aussie Open when he came up against second seed Any Roddick in the last 16.
Big-hitting Roddick had reached at least the quarter-finals on his previous three appearances in Melbourne, but he could not handle the charismatic Baghdatis, who came through in four sets.
That was not the end of the journey for Baghdatis, who made it all the way to the final and even took the first set off Roger Federer before the Swiss star went on to seal the second of his six Aussie Open titles.
The run to that final proved to be as close as Baghdatis ever got to a Grand Slam title, while Melbourne success also eluded Roddick, who reached two more semi-finals before retiring from singles action in 2012.
