Eagle-eyed fans spotted Paul Pogba and Eden Hazard sharing a private chat after Manchester United and Chelsea drew 1-1 at Old Trafford on Sunday.
Juan Mata's goal was cancelled out by a Marcos Alonso strike before half-time with neither side able to find a winner in a cagey second half.
The result leaves Ole Gunnar Solskjaer's Red Devils unlikely to make the top four, sparking further fears Pogba could leave the club in the summer.
Pogba and Eden Hazard have both been heavily linked with Real Madrid , who want the pair as the main components of an expensive summer rebuild after a miserable season.
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The duo have both referred to their "dream" to one day play for Los Blancos, fuelling speculation they will depart the Premier League in the summer.
Fans believed they were discussing the prospect of being team-mates next year as they shared a moment following the final whistle.
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One said they were "definitely discussing what Spanish neighbourhood they'll be living in next season" with another adding they were "laughing because they both know Madrid is calling".
Others joked they might have been "arranging a car pool to the Bernabeu" or "discussing changing room seating plans at Madrid".
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Pogba is also reportedly a target from Juventus and United are considering cashing in to help fund their summer spending spree.
Hazard, meanwhile, has been a long-term target for Real Madrid and manager Maurizio Sarri recently conceded he may not be able to keep the Belgian at Stamford Bridge.
