Kylian Mbappe was reportedly left behind by the Paris Saint-Germain team bus after the 1-0 Champions League semi-final first leg defeat to Borussia Dortmund on Wednesday night.
Niclas Fullkrug scored the only goal of the game at Signal Iduna Park as the Bundesliga side drew first blood.
Having netted in the stunning comeback win over Atletico Madrid in the previous round, the Germany striker popped up in the 36th minute, finishing smartly after an exquisite touch.
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Jadon Sancho was unplayable for BVB but Mbappe was kept relatively quiet by Dortmund's stern defence.
The France international did hit the post in the second half but didn't have too many sights of goal in the first leg.
Mbappe cut a frustrated figure and things didn't get much better for the former AS Monaco star at the end of the game.
He did not exit the stadium with the rest of his teammates, who headed back to the airport on the coach.
Mbappe had to stay for a longer duration of time as he was selected for random drug testing, as per Le Parisien.
In line with UEFA's protocol, he had to wait for the mandatory test to be completed and then linked up with his teammates at the airport after being taken via private transport.
PSG are still well in the tie going into next week's second leg at the Parc des Princes, with Mbappe well capable of being the difference.
Set to leave PSG on a free in the summer, the 25-year-old has extra incentive to come up clutch in the clash.
He is just two goals away from reaching half a century in the Champions League equalling compatriot Thierry Henry's tally in Europe's premier club competition.
Mbappe would therefore become the joint-eighth highest scorer in the Champions League, with Thomas Muller (53) in his sights.
Topics: Kylian Mbappe, Paris Saint-Germain, Borussia Dortmund, Champions League
Josh Lawless