The top two seeds fell in WTA Monterrey (Sloane Stephens and Nadia Podoroska); the third seed went down in ATP Acapulco (Diego Schwartzman); and the No. 1 and No. 5 seeds stumbled in Dubai (Dominic Thiem and David Goffin).

But the photograpers around the world were all winners in our book.

These are the Top 5 photos from Tuesday. (All photos Getty)

1

If a seed falls in Acapulco and not many fans are around...

Lorenzo Musetti's 6-3, 2-6, 6-4 upset of Schwartzman wasn't seen by too many fans in person, but it reverberated around the tennis world.

Top 5 Photos, 3/16: 
Upsets abound in 
Mexico and Dubai

Top 5 Photos, 3/16: Upsets abound in Mexico and Dubai

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2

Toppled

But an even bigger upset took place at the Dubai Duty Free Tennis Championships, where qualifier Lloyd Harris ousted the US Open champion Thiem, 6-3, 6-4.

Top 5 Photos, 3/16: 
Upsets abound in 
Mexico and Dubai

Top 5 Photos, 3/16: Upsets abound in Mexico and Dubai

3

Kei-O

Kei Nishikori took a step toward his goal of returning to the Top 10 with a 6-3, 7-6 (3) win over Goffin in Dubai.

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Top 5 Photos, 3/16: 
Upsets abound in 
Mexico and Dubai

Top 5 Photos, 3/16: Upsets abound in Mexico and Dubai

4

Aim High

One top seed who did advance on Tuesday? Denis Shapovalov, a comfortable 6-1, 6-3 winner over Jan-Lennard Struff.

Top 5 Photos, 3/16: 
Upsets abound in 
Mexico and Dubai

Top 5 Photos, 3/16: Upsets abound in Mexico and Dubai

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5

Bernabe Zapata Miralles

This photo of Stephens isn't from Tuesday, but it's taken from another first-round defeat in 2021: to Yulia Putintseva, at the Australian Open. On 3/16, she fell to Kristina Kucova, 6-2, 6-2.