Arsenal's fight to keep Alexis Sanchez has taken a significant twist with Paris Saint-Germain exploring whether they can sign the unsettled star striker.
Interest from the French giants will alarm Arsenal, who have failed to convince Sanchez to agree a new deal with his contract having just 18 months to run.
While Sanchez is not the only major target on PSG's list, with a number of options being considered, the club has been given sufficient encouragement that it may be worth putting together a bid at the end of this campaign.
No fee has yet been discussed for Sanchez - although that will not be a problem given PSG's financial power - and the club are likely to be able to satisfy the Chile international's wage demands.
Manager Arsene Wenger remains convinced that Sanchez wants to stay at Arsenal and sign a new deal but until that is agreed there will always be the fear that he might push to leave.
Arsenal would then have the problem of Sanchez running down his contract if they refused to sell.
The interest from PSG will be taken far more seriously by Arsenal than offers the 28-year-old is believed to have already received to join the Chinese Super League.
There remains a big disparity between Sanchez's wage demands and Arsenal's offer of £200,000 a week - he wants closer to £300,000.
Manchester City and Chelsea are also following the situation but PSG can confidently rival any offer made by another European club.
They are already in the market to add a marquee forward having not replaced Zlatan Ibrahimovic when he was allowed to leave and join Manchester United after his contract expired at the end of last season.
PSG acquired Julian Draxler from Wolfsburg this month for more than £30m and Sanchez would be another ideal signing as they continue in their ambition to be one of the big European powers and win the Champions League.
For Arsenal, the interest adds to the pressure around the club with negotiations continuing with Mesut Ozil, who is also in the final year and a half of his deal and making similar wage demands to Sanchez.
There is a sense that Ozil is the more likely to sign a new deal although he indicated in an interview with German magazine 'Kicker' this week that his future was tied to whether the manager also stays. Wenger's contract expires at the end of this campaign with a two-year extension having been discussed. It is thought is that Arsenal may want to announce deals for Sanchez, Ozil and Wenger.
But the uncertainty surrounding their star men is an uncomfortable reality for Arsenal with Sanchez having shown his frustration after last week's Premier League 3-3 draw away to Bournemouth.
It left his team-mates fearing he wanted to leave as he displayed his displeasure at the result while his team-mates celebrated their comeback.
If Sanchez - or Ozil - were to go then Arsenal would step up their interest in Borussia Dortmund's Marco Reus.
Bournemouth are considering a loan deal this month for the out-of-favour Chelsea captain John Terry - a move that would surely signal the end of his association with the club he has served for 22 years but could extend his career in the Premier League beyond this season.