Silva is delighted with the striker's goalscoring form.
He said, "It's important but this is a striker's life you know. Sometimes they do so so well and play amazing games and they don't score. Probably this afternoon wasn't his best game and he scored.
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"For example away against West Ham he didn't score but he put in a top, top performance in my opinion. Last week against Liverpool was top level too and he didn't score. In the right moment he was there, it's a great goal great assist from Timothy (Castagne) as well.
"It was an important moment for us but unfortunately it did not give us the chance to get three points."