The Albiceleste boss was delighted with his team's performance as they edged past Belgium 1-0 in Brasilia, courtesy of Gonzalo Higuain's first-half strike
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Belgium rarely looked like getting back into the contest until the latter stages when the Red Devils resorted to long balls into the Argentina area.
It was a confident performance from Argentina, which left Sabella purring. He said: "This was our best game, we were balanced and we played well.
"It is a great joy for the squad and I am happy for the people, my family and everyone that has supported me."
The only blemish on an otherwise good afternoon for Sabella was the injury suffered by Angel Di Maria which saw the Real Madrid star limp off after 33 minutes.
Sabella added: "Di Maria's injury could be costly for us. Let's see how he is."