The 26-year-old, who scored 37 objectives last season and has 11 tops for France, has concurred a five-year manage the Gunners and will turn into their second marking of the late spring, following left-back Sead Kolasinac, who joined on a free exchange from Schalke a month ago.
Weapons store won the race to sign him after Lacazette's turn to Atletico Madrid crumbled when their exchange boycott was maintained by the Court of Arbitration for Sport.
Be that as it may, while the spending won't stop there for the Gunners, regardless they confront losing Sanchez, with City progressively sure they will get him.
Arms stockpile have made it clear they would prefer not to offer the unsettled Chile star to a Premier League match. In any case, with Bayern Munich president Uli Hoeness affirming yesterday that Sanchez is excessively costly for the German monsters, they may have little alternative.
Sanchez has a year left on his agreement and is set up to see it out and leave on a free next summer unless he gets his direction.
That could yet constrain Arsene Wenger's hand, with the 28-year-old's future set to be arranged before he comes back to preparing for three weeks' opportunity.
Munitions stockpile's turn for Lacazette could likewise have thump on impacts for Olivier Giroud, who is a £20m exchange focus for Everton and West Ham.
Giroud gave a meeting this week in which he demanded he needs to remain at the Emirates, yet the landing of his kinsman could, in any case, alter his opinion.
Enormous spending Everton is driving the race for Giroud and need to make him their fifth marking of a bustling summer so far at Goodison Park.
Be that as it may, Giroud stated: "I need to bear on my great trip at Arsenal and dependably need to put forth a strong effort. Until the point when the finish of my agreement the inspiration is here dependably."