It's the argument which has got everyone talking over the last few weeks.
The fallout to Edinson Cavani and Neymar clashing over who should have taken the penalty against Lyon has put the spotlight firmly on Paris Saint-Germain.
Amongst rumours of unrest within the dressing room immediately after Cavani failed to convert the spot-kick, much of the pressure has fallen on manager Unai Emery to sort it out.
Neymar sat out the French side's 0-0 draw with Montpellier in Ligue 1 last weekend but could return when they face Bayern Munich on Wednesday.
All eyes will be on how the world's most expensive player interacts with strike partner Cavani, particularly if they are awarded a penalty over the course of the 90 minutes.
Most neutrals are probably even hoping the referee will spot an infringement inside the Bayern box just to see if round two of Neymar-Cavani occurs.
However, the PSG boss does not believe there will be a repeat situation and has tried to clear up who is on penalty-kick duties.
"Many players are able to do this," Emery said, as per Goal, when asked about who will assume the role.
"Many want it. Cavani and Neymar are ready. There will be a lot of penalties and they will both get them.
"I spoke with the two. I told them how things should happen."
Hang on a minute. So they are sharing them? Isn't that partly what got them into this mess in the first place?
Of course, you have got to feel a degree of sympathy towards Emery.
Being forced to choose between the club's summer signing, who cost an absolute fortune, and the star striker already at the club is a very delicate decision to make.
But that's exactly what Emery is paid to do and only time will tell if the former Sevilla manager has made the right call by rotating between the duo.
Let's just hope it's a scenario put to the test straight away to find out!