Fellaini won 87 caps for Belgium, scoring 18 goals, and helping them finish third at the 2018 World Cup before enjoying league and cup success with Shandong.
Bayern may already be assured of their place in the last 16 as group winners but have a point to prove themselves after being thrashed 5-1 by Eintracht Frankfurt on Saturday.
United have little time to find a solution as they prepare for Tuesday’s do or die Champions League clash against Bayern Munich, with the Red Devils only progressing if they win and the other Group A game between Copenhagen and Galatasaray ends in a draw.
Antony was hooked by Ten Hag after another woeful performance by the £87 million ($107 million) winger on the hour mark and Rasmus Hojlund’s wait for a first Premier League goal goes on.
Since Guardiola joined City in 2016, they have earned 142 more points than Man Utd (646 to 504), winning 59 more league games (204 to 145) and scored 226 more goals (678 to 452).