Britain's Cameron Norrie reached the second round of the Millennium Estoril Open in Portugal with a stunning victory over sixth seed Robin Haase.
Norrie, the world number 103, prevailed 6-4 3-6 6-3 in what was his first ATP Tour win on clay.
The British player started brilliantly, leading 4-0 and 5-1 on his way to winning the opening set before world number 43 Haase fought back to take the match to a deciding set.
But the Dutchman could not maintain the momentum and Norrie claimed a crucial break to take a 3-1 lead in the third set before closing out victory.
Norrie's performance follows up a good showing on clay in the Davis Cup in February, when he beat Spain's Roberto Bautista Agut, and shows promise ahead of his French Open debut later this month.
Fifth seed Albert Ramos-Vinolas also went out as he was beaten 6-2 6-4 by Argentina's Federico Delbonis.
Another Argentinian, the seventh seed Leonardo Mayer, was beaten 3-6 7-6 6-4 by Nicolas Jarry of Chile.
Tunisia's Malek Jaziri set up a second round clash with world number four Marin Cilic at the TEB BNP Paribas Istanbul Open with a 6-1 6-2 win over Turkey's world number 334 Marsel Ilhan.
Gael Monfils became an early casualty at the BMW Open as he was beaten in the first round by Bosnia's Mirza Basic.
Monfils, the seventh seed, lost 6-2 3-6 6-3 to the world number 90 in one hour and 37 minutes.
Basic took a firm grip on the match as he won 12 of the first 15 points in the deciding set.
Germany's Philipp Kohlschreiber, the sixth seed, led a good day for the home nation with a 7-5 6-4 victory over Ivo Karlovic.
Kohlschreiber withstood 15 aces from the Croatian to secure a spot in the last 16, where he was joined by fellow Germans Jan-Lennard Struff, Yannick Maden, Mischa Zverev and Maximilian Marterer.
Fifth seed Fabio Fognini of Italy was beaten 5-7 6-3 6-2 by compatriot Marco Cecchinato.