Summary
Chile's experienced Copa America team proved too good for Japan's young squad.
Vargas scored twice in the second half to reach 12 goals with Chile in the tournament, two more than Enrique Hormazabal.
Japan, playing as a Copa America guest for the second time, brought to Brazil a young squad focused on the Olympic tournament at home next year.
Sanchez found the net with a header in the 82nd, and Vargas closed the scoring about a minute later with a long lob shot over goalkeeper Keisuke Osako as he charged from his net.
Rueda, debuting with Chile in an official tournament, has been gradually revamping the squad since he took over in 2018 . Among the veterans back from the team's recent triumphs were Vargas, Sanchez and Arturo Vidal, who also had a good opener.
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