Upsets were in high supply during Saturday's early 2019 Miami Open Masters matches, as Naomi Osaka, Stanislas Wawrinka and Karen Khachanov all bowed out of the tournament.
The top-seeded Osaka was eliminated by giant-killer Hsieh Su-wei, who bagged wins over Karolina Pliskova, Angelique Kerber and Anastasija Sevastova earlier this year.
Injury ruined Wawrinka's bid for a deep run in a loss to Filip Krajinovic, and Jordan Thompson easily beat Khachanov.
Here's a look at select result from Saturday's early action. For full results, visit Tennis.com.
Filip Krajinovic bt. (30) Stan Wawrinka: 5-7, 6-2, 7-6 (5)
Jordan Thompson bt. (10) Karen Khachanov: 6-2, 6-3
(Q) Andrey Rublev bt. (9) Marin Cilic: 6-4, 6-4
(18) David Goffin bt. Pablo Andujar: 6-4, 6-1
(27) Hsieh Su-wei bt. (1) Naomi Osaka: 4-6, 7-6 (4), 6-3
(3) Petra Kvitova bt. (26) Donna Vekic: 6-4, 3-6, 6-4
(19) Caroline Garcia bt. (15) Julia Gorges: 6-0, 7-5
The biggest shock of the early action was Osaka's exit, although tennis writer Ben Rothenberg noted it shouldn't have come as a major surprise:
Hsieh more than lived up to her reputation for resilience, as she went down a break in each of the last two sets before she completed comebacks to secure the win.
The 33-year-old is more of a doubles specialist but is on the best run of her career in singles, including a great showing in Dubai last month. Her giant-killing reputation took off there as she made it all the way to the semi-finals before a tough loss against Kvitova.
She's picking up steam yet again in Miami—something that should worry the other top players.
Wawrinka's form cratered after a solid first set in his loss to Krajinovic, and the 33-year-old joined Osaka on his way out of the tournament.
As shared by Live Tennis, injury issues appeared to play a big part:
Both players struggled in the rallies, with many unforced errors plaguing their games. Wawrinka had a 5-2 advantage in the final tiebreak but couldn't hold on, and a wild forehand was a fitting end to the contest.
Khachanov's form was as bad, and he had the poor fortune of running into an unleashed Thompson:
The 24-year-old had a great 2018 with eight Challenger finals and is finding his feet against stiffer competition. He'll be one to keep an eye on the rest of the year.