Arsenal boss Mikel Arteta has been speaking after the Gunners lost to a 94th minute winner by Porto's Brazilian attacker Galeno. 

The North Londoners had been looking as if they would take a goalless draw back to the Emirates for the second leg of this Champions League Round of 16 clash at the Estadio Dragao on Wednesday evening. 

However, the 26-year-old Brazil forward fired past David Raya from around 25 yards out to put the hiome side in the driviogn seat in front of 49,111 fans. 

"We lacked threat, we lacked much more threat," Arteta admitted after the match adding: "More aggression [was needed], especially when we had the ball in the final third, especially in the back with more purpose to help them," 

Speaking to TNT Sports following the game, Arteta said: "We will tweak a few things to attack better especially because, to be fair, we haven't conceded much at all. But we can do better."