BUENOS AIRES (AFP) - Argentina reached their 10th Davis Cup semi-final in 13 years on Saturday when they defeated Serbia in their World Group last-eight clash.

Carlos Berlocq and Leonardo Mayer sealed the crucial point with a 6-2, 6-4, 6-1 win over Viktor Troicki and Nenad Zimonjic in the doubles.

Belgium made their first semi-final in 14 years by seeing off Canada in Ostend.

Serbia were playing without world No. 1 and recently-crowned Wimbledon champion Novak Djokovic who opted to rest rather than make the trip to Buenos Aires.

On Friday, Mayer defeated Filip Krajinovic 6-4, 6-2, 6-1 while Federico Delbonis saw off Troicki 2-6, 2-6, 6-4, 6-4, 6-2 for a 2-0 first day lead.