Britain's number five Dan Evans produced a shock result after he beat Argentina's Guido Pella in the first round of the Aegon Championships at Queen's club.
Evans is ranked 202 places below Pella, in 277 in the World, but controlled his opponent throughout.
Evans was part of Great Britain's Davis Cup team in April, beating Dmitry Tursunov as he helped the team came back from 2-0 down to beat Russia 3-2, and he again produced some fine tennis against a higher-ranked opponent.
The Birmingham-based player earned his wildcard in the Aegon Championships at Queen's club by reaching the quarter-final at the Aegon Trophy in Nottingham last week.
Evans rarely found his own serve under threat against Pella and caused constant problems with his powerful forehand.
The 22-year old fell heavily in the second game but after treatment recovered to win seven games in a row from 3-3 in the first set. He broke Pella's serve four times in total, wrapping up his victory in 57 minutes.
The 23-year old will now play Finland's 13th seed Jarkko Nieminen or Ryan Harrison of the United States in round two.
Evans revealed he came into the game with confidence and was looking forward to the game beforehand.
"I have felt good for a few weeks now and have been raring to go on grass," Evans said afterwards. "I got three games under my belt in Nottingham and came into the match feeling pretty confident."
Fellow wildcard and Britain's number two, James Ward, almost caused an upset but eventually lost to Croatian Ivan Dodig.
Ward had two match points but eventually lost 6-7 (8-10) 7-6 (7-2) 7-6 (7-2). Ranked 215th Ward was so close to an upset against the player ranked 54 in the World. Every set ended in a tie-break after Ward was serving for the match in the final set.
Write for GiveMeSport! Sign-up to the GMS Writing Academy here: http://bit.ly/12evFlH
DISCLAIMER: This article has been written by a member of the GiveMeSport Writing Academy and does not represent the views of GiveMeSport.com or SportsNewMedia. The views and opinions expressed are solely that of the author credited at the top of this article. GiveMeSport.com and SportsNewMedia do not take any responsibility for the content of its contributors.