UPDATE 2-Tennis-Buenos Aires Open men's singles results

Feb 19 (Reuters) - Buenos Aires Open men's singles results on
Saturday (prefix denotes seeding, * new result).
Semi-final                                                  
* 1-Nicolas Almagro (Spain) beat 6-Tommy Robredo (Spain) 7-5
6-1
Quarter-finals          
                                   
2-Stanislas Wawrinka (Switzerland) beat 5-Juan Monaco
(Argentina) 7-5 6-3
8-Juan Ignacio Chela (Argentina) beat 4-Albert Montanes
(Spain) 6-4 3-6 6-3
1-Nicolas Almagro (Spain) beat Jose Acasuso (Argentina) 7-5
6-3          
6-Tommy Robredo (Spain) beat 3-David Nalbandian (Argentina)
6-4 6-4