Matija Pecotic saw his dream run end Wednesday in the second round of the Delray Beach (Fla.) Open.

The 33-year-old Croatian, who works full time for an investment firm, lost 6-3, 6-3 to the United States’ Marcos Giron.

Pecotic, who is ranked 784th in the world, qualified for the tournament and then won his ATP Tour main-draw debut on Tuesday, beating former world No. 8 Jack Sock.

Against Giron, Pecotic failed to convert any of his three break-point opportunities, and he won just 44 percent of his second-serve points (11 of 25).

Giron’s quarterfinal opponent will be fourth-seeded Miomir Kecmanovic of Serbia, who beat Portugal’s Nuno Borges 6-3, 7-5.

Two U.S. players upset seeded foes in second-round matches. Michael Mmoh dumped third-seeded Canadian Denis Shapovalov 7-5, 3-6, 6-3, and Mackenzie McDonald downed fifth-seeded Yoshihito Nishioka of Japan 6-3, 3-6, 6-2.

Argentina Open

Second-seeded Cameron Norrie of Great Britain came from behind to edge Argentine wild-card entrant Facundo Diaz Acosta 4-6, 7-5, 7-6 (6) in the second round at Buenos Aires.

Diaz Acosta led 5-3 in the second set but twice lost his serve while serving for the match. The players traded service breaks early in the third set, and Diaz Acosta later led 4-1 in the decisive tiebreaker before winning seven of the last nine points.

Elsewhere in second-round action, top-seeded Carlos Alcaraz of Spain overcame Serbia’s Laslo Djere 6-2, 4-6, 6-2.

Serbia’s Dusan Lajovic won a battle of qualifiers against Argentina’s Camilo Ugo Carabelli, prevailing 6-3, 6-1. Another Argentine, Tomas Martin Etcheverry, rallied for a 4-6, 6-1, 6-2 win over Spain’s Roberto Carballes Baena.

ABN AMRO Open

Australia’s Alex de Minaur knocked out second-seeded Andrey Rublev 6-4, 6-4 in first-round action at Rotterdam, Netherlands.

Rublev won just 38 percent of his second-serve points (12 of 32) and never managed a break point against de Minaur, who converted two of his six break chances.

Three second-round matches were contested, and two seeded players were eliminated. Bulgaria’s Grigor Dimitrov edged fifth-seeded Hubert Hurkacz of Poland 7-6 (4), 7-6 (5), and the Netherlands’ Tallon Griekspoor knocked out eighth-seeded German Alexander Zverev 4-6, 6-3, 6-4. Switzerland’s Stan Wawrinka also moved into the quarterfinals by beating France’s Richard Gasquet 6-3, 6-3.

Fourth-seeded Holger Rune of Denmark, the United States’ Maxime Cressy, Italy’s Jannik Sinner and the Netherlands’ Botic van de Zandschulp won first-round matches.

–Field Level Media