Newcastle need to add a left-back to their squad in Janaury.
The 26-year-old played for just seven minutes of Newcastle's opener against Tottenham Hotspur back in August, before limping off as he clutched the back of his upper leg.
Former Sunderland and Liverpool defender Javier Manquillo has been used at left-back, as has Ireland international Ciaran Clark, but it is clear to all that they are preferred in different positions. Clark is a centre-back, Manquillo is right-footed.
Benitez could be finally given the backing he is needed to keep the Toon in the Premier League come May 2018, after Sky News reported that Amanda Staveley's PCP Capital Partners had made a £300million takeover bid to assume control.
It will renew optimism among fans and in Benitez's mind that he can steer Newcastle clear of relegation if he is given a January war chest, and a new left-back should be right on the top of his list.
Insua, 28, has just a matter of months remaining on his contract and is likely to become available in the January transfer window after falling down the pecking order at Stuttgart - where he has made just five appearances this season.
The pocket-sized Argentina international played for the Reds under Benitez for three years, before the Toon manager left in 2010. It saw Insua join Galatasaray on loan and then Sporting Lisbon permanently.
Boasting huge experience but still only in his late twenties, Insua has 46 Premier League matches under his belt and would fit perfectly into Benitez's system that relies heavily on defensively minded full-backs.
He would also give the Toon an added attacking goal threat. Much like Leighton Baines of Everton, Insua is a a threat from set-pieces with his wand of a left foot and that could be key in keeping Newcastle in the top tier.
Surely available at a bargain price and a player Benitez knows all too well, Newcastle should look to sign Stuttgart's ace Insua to solve one of their problem areas in January.
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