Manchester City keep on winning at home and now have seven straight home wins
The match was goalless until Manchester City took the lead in the 31st minute through Rúben Dias, with an assist by Rayan Cherki.
Just four minutes later later Josko Gvardiol increased the lead for Manchester City with an assist by Phil Foden.
Manchester City further increased the lead as Phil Foden netted, with an assist by Rayan Cherki, in the 65th minute.
Sunderland's Luke O'Nien was sent off in the 90th minute.
Manchester City play Crystal Palace on 14 December, West Ham United on 20 December and Nottingham Forest (away) on 27 December. Sunderland's next opponents are Newcastle United on 14 December, Brighton & Hove Albion on 20 December and Leeds United (home) on 28 December.
Manchester City's strong form in the Premier League continues and on Saturday they beat Sunderland 3-0 at home. The result means they now have seven successive home wins.
The result leaves Sunderland in seventh place, while Manchester City are in second place. Manchester City are 2 points behind Arsenal.