Theo Walcott impressed by Arsenal teammate Yaya Sanogo

Arsenal winger Theo Walcott has revealed that he is impressed by new teammate Yaya Sanogo following the striker's debut in the Emirates Cup.

The French Under-21 international made his first start for the Gunners on Sunday as they were beaten 2-1 by Galatasaray.

"He's a strong boy," Walcott told the club's official website. "He's only had a couple of training sessions with us. I've only trained with him a couple of times.

"He's a nice lad and I think he'll do very well for us. There's a lot of competition for that position."

Arsenal play their final pre-season fixture on Saturday when they face Manchester City in Helsinki.