Arsenal boss Mikel Arteta says it's critical they buy this summer.

Arteta insists Arsenal must strengthen if they are to compete with their Premier Leauge rivals next season.

"In January, the situation was that we had to fill some gaps and give some stability to the squad," he told Sky Sports. “Now is the moment to make another step forward and improve the squad and the players that we have.

"The gap between the two top teams and the rest is really, really big and everybody is trying to catch up. We have to be very smart and we have to be very decisive when we make our decisions."