ARSENAL boss Unai Emery has the magic touch when it comes to making substitutions.

Unai EmeryArsenal boss Unai Emery won his first north London derby yesterday (Pic: GETTY)

The Spaniard made a bold double change at half-time of the north London derby which paid huge dividends.With the Gunners 2-1 down to bitter rivals Tottenham, Emery withdrew Alex Iwobi and Henrikh Mkhitaryan.

He sent on Aaron Ramsey and Alexandre Lacazette both of whom made major impacts as Arsenal ran out 4-2 winners in the enthralling clash.

And Match of the Day produced a statistic that shows the manager’s changes have been on the money all season.

Emery’s replacements have been involved in 15 goals after their introductions to games, with eight goals and seven assists.The next closest are Chelsea whose subs have produced seven goals and four assists.

Next are Leicester with six, followed by Everton and title hopefuls Liverpool with combined totals of five involvements.

MotD pundit Alan Shearer sang Emery’s praises and believes Arsenal might not have won the game without his decision.

“When Arsenal were trailing 2-1 at half-time in the North London derby, Emery made two substitutions which changed the game,” he wrote in The Sun.“He basically said to Alex Iwobi and Henrikh Mkhitaryan, ‘You’re off, you’re not doing what I am asking you to do’.

“And brought on Alexandre Lacazette and Aaron Ramsey, who gave Tottenham so many problems with their running forward and in behind.

“Arsenal bossed that second half. They overran Spurs, who were weak and offered nothing.

“The Gunners have not led in the first half of any Premier League match this season but their record after the break is astonishing.“It shows Emery has obviously got his side fit and believing in what they are doing.

“He is getting every single ounce of sweat, ability and effort out of his players.

“And if they are not doing what Emery wants from them, they are out – as with Ozil, and with Mkhitaryan at half-time.”