Michael Carrick’s position as Manchester United manager came under further pressure after a 2-0 loss at Chelsea in the Premier League, with Lisandro Martinez’s reckless sending-off adding to the club’s problems Saturday. It was also a bad day for Manchester City, which lost 1-0 at home to Brighton for a second straight league defeat after opening the season with seven consecutive wins. Carrick was already under heavy pressure and seemingly operating on a match-by-match basis heading into the gam