Britain's James Auckland secured his first ever ATP Tour singles victory to book his place in the second round of the Mumbai Open in India.
Auckland is the current British number 14
The 26-year-old, who won two matches to qualify for this event - his first ATP tournament, defeated fellow-qualifier Frank Moser of Germany 6-1 6-4.
He will now face South African eighth seed Wesley Moodie who beat India's Rohan Bopanna 3-6 7-6 (7-5) 6-4.
"It was a great result for me," said the Norwich player after his win.
"It's the first time I've qualified for an ATP event so to make use of the draw was very satisfying.
"Although I haven't been playing my best tennis, I'm focusing really well and improving with each match."
The first major upset of the event came as unseeded Argentine Juan Martin Del Potro defeated Spanish fifth seed Carlos Moya 6-3 6-2.
Seventh seed Juan Monaco of Argentina was also ousted, beaten 7-6 (7-5) 6-4 by Austria's Stefan Koubek.
Auckland also enjoyed doubles success with Jamie Delgado on Wednesday when they beat Italy's Stefano Galvani and Davide Sanguinetti 6-3 5-7 10-8.