The 33-year-old missed the start of the 2021-22 campaign with a calf problem and had to wait until October 17 to make his Barcelona debut, featuring against Valencia in La Liga.
Entering Sunday's La Liga clash with Real Madrid, Aguero had failed to find the back of the net in 14 appearances against the capital giants during his time with Atletico Madrid and Manchester City.
However, the Argentina international finally got his name on the scoresheet against the Whites with a late goal in Barcelona's 2-1 defeat to their bitter rivals.
There was time for a late consolation for Ronald Koeman's team, though, with Aguero converting a cross from Sergino Dest to ensure that the home supporters had something to cheer on a disappointing afternoon. body check tags ::