NEW YORK -- Mike Bryan and Justin Gimelstob of the United States head the field of 16 men who made the U.S. Open through qualifying.

Gimelstob, with the highest profile of the men's qualifiers to make the field at the year's final Grand Slam tournament, beat fellow American Jeff Morrison 6-4, 6-4 in his final qualifying match.

The 24-year-old, who reached the third round at the U.S. Open in 1997 and '99, was sidelined for three months last fall with a foot injury and has only won one match at ATP events this year.

Bryan, better known for his doubles play, beat Ivo Karlovic of Croatia 6-2, 7-6 (5) in the final qualifying round.

The 23-year-old American reached the doubles quarterfinals here in 2000.

David Nalbandian of Argentina also qualified, beating Vincent Spadea of the United States 6-0, 7-5.

Also qualifying were Cristian Caratti of Italy; Paradorn Srichaphan of Thailand; Ivo Heuberger and Georg Bastl of Switzerland; Jan Vacek of the Czech Republic; Ramon Delgado of Paraguay; Justin Gimelstob, Eric Taino, Jack Brasington and Mike Bryan of the United States; Andre Sa of Brazil; Cyril Saulnier and Sebastien De Chaunac of France; and Bjorn Phaeu of Germany;

Several veterans were upset in the final round of the qualifying tournament.

Doubles specialist Todd Woodbridge of Australia, who has reached the third round at Flushing Meadows on three occasions, lost to Srichaphan, Byron Black of Zimbabwe fell to Caratti, and 36-year-old Ronald Agenor of Haiti, the oldest player on the ATP circuit, was knocked out by Brasington.

In the women's field, Adriana Gersi of the Czech Republic and Katarina Srebotnik of Slovenia are the only two qualifiers with a tournament title to their credit.

Gersi, 25, won took her first WTA tournament at Basel, Switzerland, earlier this year. She beat Mary Pierce at Doha, Qatar, in February en route to the semifinals.