The Gunners had been long-term admirers of the 24-year-old but the Midlands club outmuscled them to agree a £40million deal. But just how good is the Argentine? Sportsmail takes a look.
A comprehensive wrap of all the collated fixtures, scores and match reports from the Premier League: SATURDAY, 27 NOVEMBER Arsenal v Newcastle – 14:30 Liverpool v Southampton – 17:30 Crystal...
Ben Dinnery returns with the latest Premier League team news ahead of gameweek thirteen. (Getty Images)