Arsenal have agreed to meet Deportivo striker Perez’s £17m buy-out clause and have reached an agreement with Valencia of around £35m for centre-back Mustafi.
Both players are set to travel to London for medicals with Wenger confident of sealing the La Liga duo.
“We are working on the deals, but we are not close enough to announce today,” he said.
“Will we sign anyone before the window closes? I’m 99 per cent confident.”
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