Pictured : Kyle Edmund in action at the Aegon Nottingham Challenge
Wild card Kyle Edmund stunned top seed Go Soeda in straight sets to progress to the second round of the Aegon Challenge as fellow Briton David Rice also advanced in Nottingham.
Teenager Edmund needed little over an hour to beat Soeda, ranked 194 places higher, 6-2 6-2.
Victory sets up a meeting with qualifier Nick Kyrgios in the last 16 on Wednesday after the Australian edged past last year's Aegon Challenge runner-up Ruben Bemelmans 4-6 6-4 6-4.
"That was just about the perfect start, beating someone like that with that scoreline," said Edmund.
"I just focused on playing my game and not worrying about who I was playing. I knew that if I got my game on court I would have a good chance of winning."
After his first-round exit in the Aegon Trophy at the same venue last week, 19-year-old Edmund returned to the practice courts of Roehampton before taking a detour to the Queen's Club on the way back to Nottingham.
"I had another week on grass and I definitely adapted better than before," said Edmund.
While Edmund cruised through his opening match of the tournament, Rice took 2 hours 12 minutes to battle past Dimitar Kutrovsky 6-4 6-7(4) 7-5.
After taking the first set, Rice got off to an ideal start in the second by breaking the Bulgarian's first service game.
However, last week's Aegon Trophy quarter-finalist broke back to level proceedings 3-3.
And while Rice then found himself serving for the match after again breaking Kutrovsky, he failed to finish.
The 25-year-old held his nerve in a tight third set, breaking Kutrovsky's serve to close the match and progress to a second-round meeting with second seed Gilles Muller.
"It was a long match," a relieved Rice said.
"I'm proud that I stayed strong to win it in the third. It's a good match to win because he made it to the quarters here last week and has been playing well on grass."
In women's singles action, wild cards Samantha Murray and Isabelle Wallace both went out in the first round.
Ukrainian Lesia Tsurenko battled back from a set down to overcome Murray 2-6 6-4 6-4, while 17-year-old Wallace was beaten in straight sets 6-2 6-2 by World No. 159 Nicole Gibbs.
Remaining British wild cards Katie Boulter and Jade Windley get their campaigns underway on Wednesday.
Boulter got an early look at her singles opponent Veronica Cepede Royg in Tuesday's first round of doubles.
The 17-year-old from Leicestershire and Japan's Mayo Hibi were beaten by the Paraguayan and her partner Stephanie Vogt 4-6 6-0 10-6.
Windley faces a tricky opener against sixth seed Magda Linette, who last week reached the second round of the Aegon Trophy.
Wednesday's play on centre court in Nottingham starts with wild card Marcus Willis taking on seventh seed Marius Copil.
Entry to the Aegon Nottingham Challenge is free for all spectators.
For more information, including orders of play and a full list of results for the Nottingham Festival of Tennis, visit www.nottinghamfestivaloftennis.com.