Claro Open Colombia: Ivo Karlovic stuns Igor Sijsling
Last Updated: 18/07/13 7:08am
Ivo Karlovic: Caused an upset in Bogota
Ivo Karlovic caused an upset as he knocked third seed Igor Sijsling out of the Claro Open Colombia in Bogota.
Karlovic's powerful serve provided the platform for a 6-3 7-6 (16-14) victory - with the Croatian winning 84% of points on his first delivery.
Karlovic will now face Adrian Mannarino in the quarter-final, with the fifth seed having brushed aside Victor Estrella Burgos with ease.
The Frenchman, who reached the fourth round at Wimbledon, registered a 6-1 6-2 win in just 63 minutes.
Second-seeded Kevin Anderson hit 18 aces as he overcame qualifier Emilio Gomez 6-3 7-6 (7/2).
Anderson will now take on home hope Santiago Giraldo after the No 6 seed bounced back to beat Chris Guccione 3-6 6-3 6-4.
Australian qualifier Guccione must have thought he was on course for a shock win however Giraldo rallied in impressive fashion.