Arsenal manager Arsene Wenger has confirmed that he will add a new defender to his squad before the end of the summer transfer window.
The Gunners will sign Shkodran Mustafi next week according to reports in England and Italy with the German expected to fill the void left vacant by Per Mertesacker and Gabriel Paulista.
The Frenchman also insisted that finding the right player is not easy because all teams are after the same players.
"It [a new defender] was important before the game [against Leicester City] already," Wenger explained.
"You do not sign players because you think it is important or not. I believe it is very difficult to identify people and find them.
"We have many examples in England of teams that spend a huge amount of money looking for central defenders. That is why everyone is in the market for the same players and very few players as well.
"If you look at the whole transfer market, very little happens on the whole. It is about the availability of players.
"There is a huge amount of money for average players - there are plenty available. But to find the players that will strengthen your squad is much more difficult."