Signed for £63.5 million from Sporting CP, Gyokeres was expected to spearhead a new era at the Emirates, but his early weeks have been dominated by doubts over his physical readiness.
Schwarz, a former Arsenal midfielder, insists the Swede’s issues extend beyond fitness, stressing that he must also adapt mentally and tactically to meet the demands of English football and unlock his full potential.
"I believe with Viktor Gyokeres, he's not fully fit yet," he told in an interview with Hajper.
"As well with the new system, new manager, and new teammates, it takes time to develop the understanding. It's not just the physical part of it, it's the mental part as well.
“Mental tiredness may be from adapting to a new club, new expectations, and higher expectations from supporters around the whole world. But it's a good partnership (Gyokeres and Arsenal). And hopefully it will benefit Sweden for sure and Graham Potter."