Luiz Gustavo is a midfielder who it has been suspected would be surplus to requirements at Bayern under Pep Guardiola all summer long.
But only after he was left out of their squad for their Bundesliga opener has the dilemma over his future accelerated, with Bayern officially allowing him to negotiate with other clubs.
German club Wolfsburg are said to be interested, having offered him a €7 million per year salary, and are prepared to smash their own transfer record to bring him in.
But they are unable to offer Champions League football, which crucially Arsenal can - providing they get past their qualifying matches with Fenerbahce later this month.
The Gunners are said also to be in negotiations with the highly rated Brazilian, to fill a gap in defensive midfield.
However they face a familiar threat, according to reports from Italy.
The top story on the front page of Italian newspaper Corriere dello Sport proclaims 'Napoli negotiate for Luiz Gustavo'.
It adds Napoli have asked Bayern to speak to the midfielder, as Rafa Benitez steps up his pursuit of Europe's top players.
Napoli have already beaten Arsenal to one major target this summer, Argentinean striker Gonzalo Higuain.
And they still have money left over from the huge sale of Edinson Cavani to PSG. Crucially, Napoli can offer Gustavo guaranteed Champions League football, as they do not need to play in a qualifier.
Gustavo may yet end up at Arsenal, but again this is not a transfer saga they are likely to have entirely their own way, and the latest potential pitfall may cause fans to worry a little.
image: © luigig