PORTO striker Vincent Aboubakar celebrated the Portuguese club's UEFA Champions League DEFEAT against Besiktas last night - by rejoicing with the Turkish club's players in their dressing room.
The Cameroon star made a shocking show of where his loyalties lie - having shone on loan for Besiktas last season.
Aboubakar was not in the Porto squad as they lost the Champions League group opener 3-1 in Portugal.
But the way he readily joined in the Besiktas party is sure to shock not just his club but football across Europe.
The 25-year-old smiles and gives a thumbs-up sign as Besiktas players laugh in a video posted on Twitter.
Perhaps they themselves could not quite believe what Aboubakar was doing.
But a cheeky message was planted across the video: 'My brother @vincentaboubakarofficial09… I miss him.'
He was also a wanted man throughout the summer - but for a different reason.
Swansea and Newcastle were among Premier League teams sniffing around, with talk of a £9million deal.
French side Rennes were also briefly tipped to nab him - before being scared off by his reported £2.5m annual pay.
Everton are also thought to be long-time admirers.
And many were surprised when the £75m sale of Romelu Lukaku to Manchester United was not followed up with a bid for the ex-Lorient frontman.
Aboubakar has hit 22 goals in 47 games for Porto.
And he was a fans' favourite at Besiktas as he netted 12 times in 27 matches.
Watch video of Vincvent Aboubakar celebrating his team's defeat