The Argentine, who joined City in 2011, converted from Aleksandar Kolarov’s free-kick in his 147th top flight appearance.
Only Alan Shearer has completed his century faster, reaching the milestone in 124 games.
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But Newcastle felt hugely aggrieved as Aguero appeared to be well offside when Kolarov played the ball in.
https://i.eurosport.com/2016/04/19/1839360.jpg
https://i.eurosport.com/2016/04/19/1839361.jpg
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