The phrase "at a qualifier" is correct and usable in written English.
It can be used in contexts related to competitions, assessments, or events where a qualifying round or criteria is involved.
Example: "The athlete performed exceptionally well at a qualifier, securing a spot in the finals."
Alternatives: "during a qualifying event" or "in a qualifying round".
A week later, at a qualifier in Bayside, Queens, Mr. Booker broke Mr. Lerman's record by eating 16 matzo balls.
In failing to qualify, Romo found himself in distinguished company; Lee Janzen, a two-time Open champion, finished tied for 68th at a qualifier in Memphis where more than 100 golfers were vying for 12 berths.
Roberts's last chance to make the United States Open field was at a qualifier earlier this week, but he fell three strokes shy of getting into a playoff for the last spot.
Donaldson secured a second Open Championship appearance at a qualifier at Sunningdale last week.
Kudla has enjoyed the best month of his career, reaching the quarters at Queen's and then winning a round at Wimbledon as a qualifier, results that will move him into the top 100 for the first time.
After reaching the fourth round at Wimbledon as a qualifier, stunning the former world No. 1 Jelena Jankovic along the way, Oudin generated an even bigger surprise in Arthur Ashe Stadium on Thursday by thinking and willing her way past No. 4 seed Elena Dementieva, 5-7, 6-3, 6-3, in the second round.
Then, finally recovered: two strong Challenger showings in the fall of 2011 and the spring of 2012; followed by a run to the final of the French Open tuneup in Nice; followed by a first-round win at the French Open; followed by a remarkable showing at Wimbledon, where, as a qualifier, he fought his way to the fourth round and, at age 27, into the men's top 100.
It was a notable scalp for Stevenson, who reached the semi-finals as a qualifier at Wimbledon in 1999.
While the Frenchman can be dangerous when given the opportunity at a higher level than he is used to – he upset sixth seed Tomas Berdych in five sets in the first round at Roland Garros in 2011 as a qualifier – he lost in the first round of qualifying to James Ward in Brisbane, and in the second round to the American Ryan Harrison in Sydney.
McDonald took several significant steps last year, starting when he won his first-round match at the Australian Open as a qualifier and then took No. 3 seed Grigor Dimitrov to five sets.
"I would say that 0-0 is more or less an honest result," he said of the 0-0 draw in the Group A qualifier at Hampden Park.
