The captain's armband is up for grabs at City after Vincent Kompany left at the end of last season after 11 years in Manchester to take up a player-coach role at Anderlecht, the club at which the 33-year-old started his career.
Atletico said on their website they had signed a 'fantastic and experienced player from the Champions League runner up' and added Trippier had agreed on a three-year deal.
It is the first meeting of CAF’s 54-member associations since allegations of fraud and sexual harassment were levelled against CAF president Ahmad Ahmad in April.
Both players would make the first appearance in the Currie Cup for coach Pote Human in round two of the tournament.
Bruce has agreed a three-year contract with the Premier League club, but his appointment to succeed Rafael Benitez wasn't met with universal approval by Newcastle supporters.
On Thursday, Province Currie Cup team, Cape Town City FC and the Cape Cobras team would collectively give their 67 minutes to help the Langa Cheshire Home for the Disabled.
The side's fourth victory from four matches leaves them on the brink of a semifinal berth, which they can seal with a victory over Uganda on Wednesday.
The Spaniard is reportedly close to signing a new five-year deal with United worth in excess of £350,000 a week that would make him the highest paid goalkeeper in the world.
Marc van Heerden joined the newly-promoted Cape-based side as a free agent, having parted ways with AmaZulu at the end of the 2018/19 season.
The Springbok was dealt with a blow after winger Aphiwe Dyantyi returned to the Golden Lions, where he would undergo rehabilitation for a hamstring injury.
