Within a three-to-four-week timeline, Saliba will aim to be back in action for Arsenal's trip to Newcastle United on September 28 or for Olympiacos' visit to the Emirates three days later. In the meantime, he is set to miss a crunch fixture against Manchester City and the Gunners' opening Champions League fixture of the season at Athletic Club. Mosquera or Piero Hancapie are likely to be tasked with stepping up in his absence.