Two goals in as many minutes from Olivier Giroud helped FA Cup holders Arsenal progress to this season's Sixth Round at the expense of Middlesbrough. Courtesy of FA TV. (4:41)

Arsenal striker Olivier Giroud has told the London Evening Standard that he sometimes struggles for confidence but stressed that he tries to "give my best every game."

Giroud produced an outstanding performance to take his goals total for the season into double figures as he struck twice to defeat Middlesbrough at the Emirates in the FA Cup fifth round.

The 28-year-old Frenchman was praised by Gunners boss Arsene Wenger, who said he believed he had matured into a far better all-round player since arriving in north London.

Giroud said: "To improve as a player was my target when I signed for Arsenal.

"I always wanted to improve myself and give everything for the team, for the fans and the club. I love this shirt and I want to achieve big things with this team.

"I try to give my best every game. Sometimes it goes easy, sometimes I struggle a bit more, but it is always a determination. I try to keep it high in my head, because it is my worst enemy.

"The boss told me that before, and sometimes I need to push myself a bit out of my comfort zone."