Some distressing scenes occurred at the Estadio Wanda Metropolitano during the Europa League semi-final between Atletico Madrid and Arsenal.
Arsenal, who are trailing by an away goal after a 1-1 draw at the Emirates, were captained by their main man in defence, Laurent Koscielny.
In the seventh minute, with no-one near him in midfield, the Frenchman went to ground and looked to be in a great deal of pain. He was diagnosed with chronic tendinitis in both feet by the French Football Federation during an international break in October 2014, and as of last year requires daily treatment in order to continue playing.
In clutching his right achilles tendon, and the subsequent despair shown by the 32-year-old, it appears that the injury has flared up again at the worst possible time. Treatment was administered for five minutes before Koscielny was stretchered off the pitch.
If it is as serious as it looks, the defender is definitely ruled out of the Europa League final on May 16 should the Gunners reach it.
As for the World Cup, Koscielny has only represented his national side at the 2014 iteration, where France reached the quarter final.
At 32 years of age, Moscow could represent his last chance to win the competition and emulate his 1998 predecessors.
Jake Humphrey of BT Sport has released an update, confirming the unfortunate news of a torn achilles.
Confirmed torn Achilles for #Koscielny. 6 months expected recovery time…poor guy
— Jake Humphrey (@mrjakehumphrey) May 3, 2018