Mikel Arteta has sent William Saliba a stark warning ahead of next season.
Arsenal are approaching the transfer window with big ideas but without the money to carry them out.
After Arteta was appointed earlier this season, the Spaniard laid out plans on where he wanted to strengthen.
But the coronavirus crisis has meant that the Gunners have had to strap in their cash amid the uncertain financial climate.
It means that the big signings Arteta had requested may not go through and instead the club are looking at cheap deals.
One position in need of bolstering is at centre-back, where Arsenal have looked weak all season.
But Arteta can breathe a sigh of relief to receive Saliba, who will be ready to play for the north London outfit next season.
The defender has been earmarked as one of the top talents coming out of France and has enjoyed a fine campaign with Saint-Etienne.
He was signed from the French club last summer but was allowed to stay there to continue his development.
The 19-year-old was set to make the move to Arsenal this summer but Arteta has allowed him to stay longer.
Saint-Etienne have made it to the Coupe de France final, which will now go ahead despite league football already being called off.
Arteta said: “I think he needs to stay there. We’ve got an agreement with Saint-Etienne and he’s earned his right to play that final.”
However, the former Manchester City assistant also stated that Arsenal fans should quell their expectations on the youngster.
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Many are keen to see the centre-back make an immediate impression despite still being a teenager.
Saliba was signed for a huge £27m last summer and Arteta has called for calm.
He added: “I spoke with him a few times. We’ve been following his season, he had a difficult season with injuries.
"I know how high expectations are for him next season but we have to bear in mind his age.”
Arsenal are facing a battle to land a European spot this season and sit 10th in the Premier League.
They face Norwich this evening, with the Canaries fighting to stay in the top tier.