Armstrong came through the Newcastle academy but barely featured for the first team.
After loan spells, Newcastle decided to sell the forward to Blackburn last summer for £1.75 million.
Armstrong has since turned out to be a bargain for Rovers. In 29 Championship starts, the 23-year-old has posted nine goals and six assists.
In his last nine outings, he has four goals and four assists.
Armstrong’s form has coincided with Blackburn’s push up the table. Rovers are now just three points off the playoff places.
Newcastle are going well in the Premier League, despite their latest defeat to Arsenal.
But they may regret not giving Armstrong a bigger opportunity to impress at St. James’ Park. His form evidently shows he has ability.
Blackburn boss Tony Mowbray will be delighted with his attacking player. After Bradley Dack’s injury, many suspected the Lancashire side would struggle for creativity and goals.
Considering his age and the way the market has gone in recent years, Rovers could pocket a hefty profit on him this summer should Premier League clubs make a move.
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