Arsenal manager Unai Emery was delighted with Calum Chambers' performance in Sunday's win over Newcastle United.
The centre-back returned to North London this summer after a successful loan spell with Fulham last season.
His performance pleased Emery, who believes the Gunners have plenty of strength in defence.
He told the club's website: "Really, last year for Calum Chambers was a very good year because he played all the matches with Fulham.
"They played him as centre-back in a three, in a two and they played him as a midfielder.
"From pre-season, he deserved to play today in the first XI and he was very focused and with Sokratis was also very serious.
"I want to have very competitive players in each position. With David Luiz, with Holding when he is coming back to help us, with training regularly and playing with the under-23s because he will play again tomorrow.
"And with Hector Bellerin, one month more. Today we also had Sead out and the injury to Kieran Tierney. I think we can and will want to become stronger defensively, but above all being one offensive team."
