Nicolas Colazo scored a first-half winner as Gimnasia ensured their survival in Argentina's Primera Division next season with a 1-0 win over Colon.Former Boca Juniors winger Colazo put the hosts ahead in the 42nd minute at Marcelo Bielsa .
River Plate advanced to the quarterfinals of the Argentine Primera Division's second stage with a goalless draw against Instituto.The Buenos Aires giants had 78 per cent of total possession and completed 633 passes compared to Instituto's 191 .
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