Danilo Pereira only joined Porto last summer from Maritimo
Danilo only joined Porto in the summer from Maritimo but has shone in Portugal so far this season.
And according to Portuguese newspaper A Bola, former Gunners winger Luis Boa Morte was at the Estadio do Dragao on Monday night to watch the Portugal international.
Danilo was in action as Porto suffered a 1-0 home defeat to Tondela in the Primeira Liga.
The Portuguese club will be reluctant to sell the 24-year-old, but he has a release clause of £29million.
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