Serbia’s Janko Tipsarević earned his first Association of Tennis Professionals (ATP) Tour-level win since August 2017 on a rain-hit day at the Miami Open.
The 34-year-old beat the United States' Bradley Klahn 6-3, 6-3 at the Hard Rock Stadium, booking his place in the second round of the ATP Tour Masters 1000 event.
Tipsarević, the former world number eight, is playing in his third tournament of the season after missing all of 2018 to recover from surgeries on both hamstring tendons.
He will next face Spain’s Roberto Bautista Agut, the 22nd seed who received a bye through to round two.
Other winners on a rainy day included Poland's Hubert Hurkacz, a quarter-finalist at the Indian Wells Masters earlier this month before losing to Swiss legend Roger Federer.
Hurkacz defeated Italy's Matteo Berrettini 6-4, 6-3 and will next meet Indian Wells champion Dominic Thiem of Austria.
Argentinians Federico Delbonis and Guido Andreozzi also advanced with the former overcoming Germany’s Peter Gojowczyk 6-4, 6-2 and the latter beating Kazakhstan’s Mikhail Kukushkin 7-6, 6-4.
Delbonis will next meet Australia's John Millman, while Andreozzi plays Italy's Fabio Fognini.
Spain's Roberto Carballés Baena set-up a second-round meeting with Croatia's Borna Ćorić by defeating the US’s Denis Kudla 6-1, 6-2.
Elsewhere, Germany's Mischa Zverev saved eight match points in the second set of his victory over Spanish wild card Nicola Kuhn, who retired at 2-2 in the deciding set.
Among today’s first-round winners in the Women's Tennis Association Premier Mandatory Tour event was American teenager Amanda Anisimova.
The 17-year-old overcame former top-10 player Andrea Petkovic of Germany 6-4, 6-3 in just under an hour and a half.
She will take on Estonia’s Anett Kontaveit in her next match.
Also tasting victory was three-time champion Victoria Azarenka of Belarus, striking 41 winners on her way to beating Slovakia’s Dominika Cibulková 6-2, 3-6, 6-4.
"She's always bringing a little bit of a next level and a good game," Azarenka, the former world number one, said of Cibulková.
"She's a big fighter.
"So I knew it's not going to be easy, for sure."
Action in Miami is due to continue tomorrow.
There are a whopping 26 first-round singles matches on the men's schedule.
No play was possible yesterday due to heavy rain.