Marco Reus has been in sensational form for Borussia Dortmund of late, firing goals past Real Madrid and Bayern Munich this month.
Rumours of Manchester United's interest has also gathered pace, with the other side strongly linked being Barcelona, who have an imposed transfer ban.
Publicly Reus has always expressed his affection only for Dortmund, with claims said to have been made by former teammate Mario Gotze regarding an Old Trafford switch decried as untrue.
Yet this week the German was involved in another intriguing debate with a current teammate, goalkeeper Roman Weidenfeller.
The argument occurred during the German Cup semi-final, and is detailed by Kicker magazine.
They state that Reus and Weidenfeller had a 'colourful' argument, after Reus lost the ball in midfield.
The pair even exchanged 'an intense war of words' shouting at each other from 30 metres apart on the field.
After the game Jurgen Klopp described the incident as a consequence of the 'unbelievable' level Reus was playing at - but said by the end of the game 'all the oxygen had gone from his head'.
Klopp also cited goalkeeper Weidenfeller for his part in the argument, adding that for goalkeepers you need a 'certain level of aggression', and so on part it was 'understandable'.
Captain Sebastien Kehl said he was sure the pair would thrash out their differences and 'go for food over the weekend.'
Not a bust-up to drive Reus into Manchester United's waiting arms, but it can't do any harm. It also illustrated his passion for the game and to succeed.
Teammates willing to argue with each other while 2-0 up in a Cup semi-final are a rare breed.