UNAI Emery hailed the positive impact of David Luiz as the summer signing's first Arsenal goal secured Premier League victory over Cherries.

Luiz, 32, joined from Chelsea in August and recorded his maiden goal and first clean sheet as the Gunners won 1-0 to move third in the table, just a point adrift of reigning champions Manchester City.

The shut-out was only the second time in 13 league games Emery's side have stopped the opposition from scoring, as Cherries failed to find the target.

Luiz's glancing header from Nicolas Pepe's ninth-minute corner ended up settling the contest - with Emery praising the defender after the game.

"Yes, because he's very positive," he replied when asked if Luiz is popular in the dressing room.

"Every time he's speaking about positive things and helping young players.

“He came late into the squad but really, his commitment is very high with us and his behaviour is too. Everybody is happy with that.

"We knew if we won, we'd go third.

“For our confidence and our way, it was important, but not feeling the pressure of that.

“Maybe in the second half, we were winning 1-0, maybe in some moments we felt that pressure."