When Celtic added both Duran and Kasper Hogh in the summer, there were plenty of questions as to how Martin O'Neill would utilise two strikers.
Both scored goals for fun at their respective clubs last season, including in the Champions League, and both prefer to play through the middle.
Since their arrivals, Hogh has been deployed centrally with Duran pushed out on the right but, in light of the former's injury, Duran has been used through the middle. And, boy, has he given O'Neill something to think about when Hogh returns.
That's now six goals in seven games for the Colombian who, alongside his goal on Wednesday, added another assist to his tally for eight goal involvements in seven competitive games.
Against Aberdeen, Duran had six shots, four on target and five inside the box, along with eight touches. He also generated an xG (expected goals) of 0.62.
Even if Hogh is fit for Saturday's trip to St Mirren, it feels like Duran has made a real claim to keep his spot up top.