United are yet to formally announce the signing of the Tottenham left-back but Ten Hag said: “Reguilon is here, he trained.”
Asked if the Spain international would be available to face the Gunners, the United boss said: “Yes.”
“He’s very experienced,” added Ten Hag. “Played for big clubs, played a lot of games in LaLiga and Premier League.
“He has a very good background. We’ve seen he can play intense football and we are happy.
“We had a problem with [Luke] Shaw and [Tyrell] Malacia and I think we responded very well to that emergency situation.”
Shaw and Malacia are currently sidelined with injuries, with Ten Hag having to call on right-back Diogo Dalot at left-back already this season.
Reguilon has not featured in a competitive game for Tottenham since April 2022 and spent last season on loan at Atletico Madrid, where he played 11 LaLiga games.
