Timber missed the Netherlands' World Cup campaign, and the Netherlands were eliminated in the Round of 32 after losing to Morocco on penalties.
Timber has returned to London from Arsenal’s training camp in Spain due to a groin injury that sidelined him late in last season.
The Dutch international missed two months at the end of last season due to an ankle injury, but he made it back in time for the team's Champions League final defeat to Paris Saint-Germain.
However, subsequent groin problems caused him to miss the World Cup.
It is understood that the right-back has returned to London from Arsenal's training camp in Spain, but sources emphasize that this trip was part of his rehabilitation program and not a relapse during his recovery.
Timber is expected to return to Spain and rejoin the team.
Timber is Arsenal's first-choice right-back, and he played in 30 Premier League matches during the team's Premier League title win last season.
He joined Arsenal from Ajax in July 2023 for an initial transfer fee of £34 million, but missed most of his first season due to a torn cruciate ligament in his knee.
Arsenal will face Manchester City in the Community Shield at 10 PM Beijing time on August 16th, and then begin their Premier League title defense at 3 AM on August 22nd, starting with a match against newly promoted Coventry City.
